Updated on 2025/03/28

写真a

 
YANO Rikizo
 
Organization
Graduate School of Engineering Applied Physics 3 Assistant Professor
Graduate School
Graduate School of Engineering
Undergraduate School
School of Engineering Physical Science and Engineering
Title
Assistant Professor

Degree 3

  1. 博士（理学） （ 2016.3   東京工業大学 ） 

  2. Master of Engineered Materials （ 2013.3   Tokyo Institute of Technology ） 

  3. 学士(工学) （ 2011.3   慶應義塾大学 ） 

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Research Interests 6

  1. Topological materials

  2. Crystal growth

  3. Superconducting junctions

  4. Majorana Fermions

  5. Magnetic materials

  6. Thermoelectric materials

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Research Areas 5

  1. Nanotechnology/Materials / Inorganic materials and properties  / 単結晶育成、電気伝導性評価

  2. Natural Science / Magnetism, superconductivity and strongly correlated systems

  3. Natural Science / Semiconductors, optical properties of condensed matter and atomic physics

  4. Nanotechnology/Materials / Composite materials and interfaces  / 超伝導接合、近接効果、トポロジカル物質

  5. Nanotechnology/Materials / Inorganic materials and properties

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Current Research Project and SDGs 1

  1. トポロジカル物質を用いた新奇現象の開拓

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Research History 7

  1. Nagoya University   Graduate School of Engineering Applied Physics 3   Assistant Professor

    2022.4

  2. Nagoya University   Department of Applied Physics   Assistant Professor

    2022.4

  3. Nagoya University   Assistant Professor

    2020.4 - 2022.3

  4. Nagoya University   Institute of Materials and Systems for Sustainability   Assistant Professor

    2020.4 - 2022.3

  5. Nagoya University   Graduate School of Engineering   Researcher

    2018.4 - 2020.3

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    Country：Japan

  6. National Institute of Advanced Industrial Science and Technology (AIST)   Postdoc

    2016.10 - 2018.3

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    Country：Japan

  7. Japan Society for Promotion of Science   Research Fellowship for Young Scientists

    2015.4 - 2016.9

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    Country：Japan

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Education 3

  1. Tokyo Institute of Technology   Graduate School, Division of Integrated Science and Engineering

    2013.4 - 2016.3

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    Country： Japan

  2. Tokyo Institute of Technology   Graduate School, Division of Integrated Science and Engineering

    2011.4 - 2013.3

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    Country： Japan

  3. Keio University

    2007.4 - 2011.3

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Professional Memberships 3

  1. THE PHYSICAL SOCIETY OF JAPAN

  2. THE JAPAN SOCIETY OF APPLIED PHYSICS

  3. Thermoelectrics Society of Japan

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Committee Memberships 3

  1. 日本物理学会   領域6（超伝導・密度波分野） 運営委員  

    2024.4 - 2025.3   

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    Committee type：Academic society

  2. 応用物理学会東海地区若手チャプター   副代表  

    2023.4   

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    Committee type：Academic society

  3. 応用物理学会東海地区若手チャプター   役員  

    2022.1 - 2023.3   

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    Committee type：Academic society

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Awards 5

  1. フロンティア材料研究所学術賞　研究奨励賞

    2021.7   東京工業大学 フロンティア材料研究所   新奇超伝導状態観測に向けた層状物質の単結晶育成と物性評価

    矢野力三

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    Country：Japan

    本研究所の若手教員の研究および共同利用研究の奨励を目的として、世界最先端の研究推進、未踏分野の開拓、萌芽的研究の革新的展開又は解決が困難とされている重要課題の追求などに果敢に挑戦している独創性豊かな新進気鋭の研究者を表彰するとともに研究費の支援を行うものです。（フロンティア材料研究所ホームページより引用）

  2. Poster Award

    2014.2   The Workshop on Education and Research Center for Materials Innovation   Thermoelectric properties of ACrX2 (A = Cu, Ag; X = S, Se) single crystals

    R. Yano and T. Sasagawa

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    Award type：Award from international society, conference, symposium, etc. 

  3. 土肥賞

    2013.3   東京工業大学　物質科学創造専攻  

    矢野力三

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    東京工業大学物質科学創造専攻の修士論文発表会における受賞

  4. Best Poster Award

    2012.11   The 3rd International Symposium on Advanced Materials Development and Integration of Novel Structural Metallic and Inorganic Materials (AMDI-3)   Synthesis and Characterization of Thiospinels (Cu,Zn)Cr2S4 as Candidate Half-Metals

    R. Yano, A. Isayama, and T. Sasagawa

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    Award type：Award from international society, conference, symposium, etc. 

  5. 最優秀賞

    2012.8   チオスピネル(Cu,Zn)Cr2S4におけるハーフメタルの開発

    矢野力三

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    Award type：Award from Japanese society, conference, symposium, etc. 

    第57回物性若手夏の学校における口頭発表に対して会場の参加者全員からの投票形式での受賞

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Papers 17

  1. Tuning of Anomalous Hall Effect by Systematic Doping on Mn<sub>3</sub>Sn Reviewed International journal Open Access

    Yano, R; Kabeya, T; Hayashi, M; Kihara, S; Suto, H; Yoshida, K; Yamaguchi, T; Kashiwaya, S

    CRYSTAL GROWTH & DESIGN   Vol. 24 ( 15 ) page： 6124 - 6130   2024.7

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    Authorship：Lead author   Language：English   Publisher：Crystal Growth and Design  

    Mn3Sn is an AHE antiferromagnet exhibiting a hysteretic anomalous Hall effect (AHE) originating from the cluster octupole moments of inverse triangular antiferromagnetic spins at room temperature, whereas the AHE disappears at low temperatures. In this study, we evaluated the systematic doping effect on the AHE of Mn3Sn to stabilize the AHE at low temperatures. We grew single crystals of M0.1Mn2.9Sn and Mn3Sn0.9X0.1 (M = Cr and Fe; X = Si and Ge) and evaluated their transport and magnetic properties. Compared with doping at the Sn site, doping at the Mn site drastically changes the AHE at low temperatures. Reproducible magnetic structures were not observed at low temperatures owing to low Fe content fluctuation near x ∼ 0.1 in FexMn3-xSn. Some crystals showed a large hysteretic-type AHE, unlike the AHE at 300 K, while others did not show a finite AHE below 50 K. Conversely, Cr doping stabilizes the AHE with additional magnetoresistance that hinders observing the AHE. Considering these features, we prepared Cr and Fe codoped Mn3Sn crystals. The Fe0.05/Cr0.1-doped Mn3Sn crystals showed the AHE from room temperature to 2 K without magnetic transitions. This finding provides a new route to access octupole-driven phenomena of Mn3Sn-based devices at low temperatures.

    DOI： 10.1021/acs.cgd.4c00104

    Open Access

    Web of Science

    Scopus

  2. Giant impurity effect on anomalous Hall effect of Mn<sub>3</sub>Sn Reviewed International journal

    Yano, R; Kihara, S; Yoneda, M; Vu, HTN; Suto, H; Katayama, N; Yamaguchi, T; Kuwahara, M; Suzuki, MT; Saitoh, K; Kashiwaya, S

    JOURNAL OF CHEMICAL PHYSICS   Vol. 160 ( 18 )   2024.5

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Journal of Chemical Physics  

    Mn3Sn is an anomalous Hall effect (AHE) antiferromagnet that exhibits the hysteretic AHE in antiferromagnetic (AFM) phase at room temperature. We report that whisker Mn3Sn crystals grown by the flux method exhibit a non-hysteretic AHE at mid-to-low temperatures when the whisker Mn3Sn is surrounded by a thin layer of ferromagnetic Mn2−xSn. These crystals exhibit a hysteretic AHE above 275 K due to the spin alignment of the inverse triangular lattice, which is similar to other crystals. However, upon cooling the crystal, it exhibits a non-hysteretic AHE with a spiral AFM spin structure at 100-200 K. We concluded that the non-hysteretic AHE is induced at the interface of Mn2−xSn/Mn3Sn. We believe that the scalar-spin chirality in the spiral AFM phase of Mn3Sn, modulated by Mn2−xSn through the magnetic proximity effect, produces the AHE. This discovery opens a new avenue for tailoring the AHE by magnetic layers.

    DOI： 10.1063/5.0195211

    Web of Science

    Scopus

    PubMed

  3. Evidence of unconventional superconductivity on the surface of the nodal semimetal CaAg1−xPdxP Reviewed International journal

    Rikizo Yano, Shota Nagasaka, Naoki Matsubara, Kazushige Saigusa, Tsuyoshi Tanda, Seiichiro Ito, Ai Yamakage, Yoshihiko Okamoto, Koshi Takenaka, Satoshi Kashiwaya

    Nature Communications   Vol. 14 ( 1 ) page： 6817   2023.10

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41467-023-42535-5

    Web of Science

    Scopus

    PubMed

  4. Magnetic Gap of Fe-Doped BiSbTe2Se Bulk Single Crystals Detected by Tunneling Spectroscopy and Gate-Controlled Transports Reviewed International coauthorship International journal

    Rikizo Yano, Andrei Kudriashov, Hishiro T. Hirose, Taiki Tsuda, Hiromi Kashiwaya, Takao Sasagawa, Alexander A. Golubov, Vasily S. Stolyarov, Satoshi Kashiwaya

    JOURNAL OF PHYSICAL CHEMISTRY LETTERS   Vol. 12 ( 17 ) page： 4180 - 4186   2021.5

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER CHEMICAL SOC  

    Topological insulators with broken time-reversal symmetry and the Fermi level within the magnetic gap at the Dirac cone provides exotic topological magneto-electronic phenomena. Here, we introduce an improved magnetically doped topological insulator, Fedoped BiSbTe2Se (Fe-BSTS) bulk single crystal, with an ideal Fermi level. Scanning tunneling microscopy and spectroscopy (STM/STS) measurements revealed that the surface state possesses a Dirac cone with the Dirac point just below the Fermi level by 12 meV. The normalized dI/dV spectra suggest a gap opening with Delta(mag) similar to 55 meV, resulting in the Fermi level within the opened gap. Ionic-liquid gated-transport measurements also support the Dirac point just below the Fermi level and the presence of the magnetic gap. The chemical potential of the surface state can be fully tuned by ionic-liquid gating, and thus the Fe-doped BSTS provides an ideal platform to investigate exotic quantum topological phenomena.

    DOI： 10.1021/acs.jpclett.1c00869

    Web of Science

    Scopus

    PubMed

  5. Unusual Superconducting Proximity Effect in Magnetically Doped Topological Josephson Junctions Reviewed International journal

    Rikizo Yano, Masao Koyanagi, Hiromi Kashiwaya, Kohei Tsumura, Hishiro T. Hirose, Takao Sasagawa, Yasuhiro Asano, Satoshi Kashiwaya

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 89 ( 3 ) page： 034702 - 034702   2020.3

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：PHYSICAL SOC JAPAN  

    The transport properties of a topological Josephson junction fabricated from a magnetically doped topological insulator (TI) were investigated. The conductance spectra of the Nb/Fe-Bi2Te2Se/Nb junction below 1 K showed an unusual trident-shaped zero-bias conductance peak with a tiny peak width of similar to 6 mu V. The central peak of the trident peak presents the dc-Josephson current, and the side peaks may reflect an induced unconventional Cooper pairing. Additionally. the critical currents followed inverse to temperature, which may also reflect the presence of an unconventional proximity effect. Furthermore, microwave irradiation drived a drastic change in the conductance spectra from the peak structure into oscillatory ones, a hallmark of the ac-Josephson supercurrent. The current-phase relation of the ac-Josephson effect under high power radiofrequency-irradiation was found to be 4 pi-periodic. The results suggest that the junction based on magnetically doped 3D TIs may realize an unconventional Cooper pairing, thus enabling access to the basic physics of Majorana bound states and unconventional superconductivity.

    DOI： 10.7566/JPSJ.89.034702

    Web of Science

    Scopus

  6. Theory of Josephson current on a lattice model of grain boundary in <i>d</i>-wave superconductors Reviewed International journal

    Sakamori, T; Kashiwaya, S; Yano, R; Tanaka, Y; Hatano, T; Yada, K

    SUPERCONDUCTOR SCIENCE & TECHNOLOGY   Vol. 36 ( 8 )   2023.8

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Superconductor Science and Technology  

    Identifying the origins of suppression of the critical current at grain boundaries of high-critical-temperature superconductors, such as cuprates and iron-based superconductors, is a crucial issue to be solved for future applications with polycrystalline materials. Although the dominant factor of current suppression might arise during material fabrication and/or processing, investigating it due to an internal phase change of the pair potential is an important issue in understanding the threshold of the critical current. In this paper, we study the Josephson current on a symmetric [001]-tilt grain boundary (GB) of a d-wave superconductor on a lattice model. In addition to the suppression of the maximum Josephson current associated with the internal phase change of the d-wave pair potential which has been predicted in continuum models, we find a unique phase interference effect due to folding of the Fermi surface in the lattice model. In particular, the resultant maximum Josephson current at low-tilting-angle regions tends to be suppressed more than that in preexisting theories. Because similar suppressions of the critical current at GBs have been reported in several experimental works, the present model can serve as a guide to clarify the complicated transport mechanism in GBs.

    DOI： 10.1088/1361-6668/acdeaf

    Web of Science

    Scopus

  7. Evaluation of Magnetic Field Induced by Time-Reversal Symmetry Broken Superconductors Reviewed

    Mitsuhiro Teshigawara, Yasunori Mawatari, Hirotake Yamamori, Rikizo Yano, and Satoshi Kashiwaya

    Proceedings of the 29th International Conference on Low Temperature Physics (LT29)   Vol. 38   page： 011069   2023.5

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    Language：English   Publishing type：Research paper (international conference proceedings)  

  8. Transport Properties of Magnetically doped Topological Insulator Fe-BiSbTe2Se Reviewed

    Tsuyoshi Tanda, Rikizo Yano, Hishiro T. Hirose, Takao Sasagawa, and Satoshi Kashiwaya

    Proceedings of the 29th International Conference on Low Temperature Physics (LT29)   Vol. 38   page： 011180   2023.5

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    Language：English   Publishing type：Research paper (international conference proceedings)  

  9. Andreev Bound States and Doppler Shift in La1.85Sr0.15CuO4/Au Junctions Invited Reviewed

    Hironori Teshima, Kang Donguhn, Takashi Sakamori, Rikizo Yano, Yuya Hiramatsu, Shun Tamura, Keiji Yada, Yukio Tanaka, Takao Sasagawa, and Satoshi Kashiwaya

    Proceedings of the 29th International Conference on Low Temperature Physics (LT29)   Vol. 38   page： 011041   2023.5

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    Language：English   Publishing type：Research paper (international conference proceedings)  

    DOI： 10.7566/JPSCP.38.011041

  10. Two-Band Model and Point Contact Spectroscopy of Nodal-Line Semimetal CaAg<sub>0.9</sub>Pd<sub>0.1</sub>P Reviewed International journal

    Naoki Matsubara, Shota Nagasaka, Rikizo Yano, Kazushige Saigusa, Yusaku Shinoda, Yoshihiko Okamoto, Koshi Takenaka, Satoshi Kashiwaya

    Proceedings of the 29th International Conference on Low Temperature Physics (LT29)     2023.5

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    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：Journal of the Physical Society of Japan  

    DOI： 10.7566/jpscp.38.011028

  11. Evaluation of Magnetic Field Induced by Broken Time-Reversal Symmetry Superconductors Reviewed International journal

    Mitsuhiro Teshigawara, Yasunori Mawatari, Hirotake Yamamori, Rikizo Yano, Satoshi Kashiwaya

    JPS Conf. Proc.: Proceedings of the 29th International Conference on Low Temperature Physics (LT29)   Vol. 38   page： 011069   2023.5

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    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：Journal of the Physical Society of Japan  

    DOI： 10.7566/jpscp.38.011069

  12. Proximity-Induced Superconducting States of Magnetically Doped 3D Topological Insulators with High Bulk Insulation Reviewed International journal

    Rikizo Yano, Hishiro T. Hirose, Kohei Tsumura, Shuhei Yamamoto, Masao Koyanagi, Manabu Kanou, Hiromi Kashiwaya, Takao Sasagawa, Satoshi Kashiwaya

    CONDENSED MATTER   Vol. 4 ( 1 ) page： 1 - 9   2019.1

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：MDPI  

    We studied magnetized topological insulator/superconductor junctions with the expectation of unconventional superconductive states holding Majorana fermions induced by superconductive proximity effects on the surface states of magnetized topological insulators (TIs), attached by conventional superconductors. We introduced Fe-doped BiSbTe2Se as an ideal magnetic TI and used the developed junction fabrication process to access the proximity-induced surface superconducting states. The bulk single crystals of the Fe-doped TI showed excellent bulk-insulating properties and ferromagnetism simultaneously at a low temperature. Meanwhile, the fabricated junctions also showed an insulating behavior above 100 K, as well as metallic conduction at a low temperature, which reflects bulk carrier freezing. In addition, we observed a proximity-induced gap structure in the conductance spectra. These results indicate that the junctions using the established materials and process are preferable to observe unconventional superconducting states which are induced via the surface channels of the magnetized TI. We believe that the developed process can be applied for the fabrication of complicated junctions and suites for braiding operations.

    DOI： 10.3390/condmat4010009

    Web of Science

    Scopus

  13. Extremely large magnetoresistance in a high-quality WTe2 grown by flux method Reviewed International journal

    K. Tsumura, R. Yano, H. Kashiwaya, M. Koyanagi, S. Masubuchi, T. Machida, H. Namiki, T. Sasagawa, S. Kashiwaya

    J. Phys. Conf. Ser.: 28TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT28)   Vol. 969   2018

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    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IOP PUBLISHING LTD  

    We have grown single crystals of WTe2 by a self-flux method and evaluated the quality of the crystals. A Hall bar-type device was fabricated from an as-exfoliated film on a Si substrate and longitudinal resistance R-xx was measured. R-xx increased with an applied perpendicular magnetic field without saturation and an extremely large magnetoresistance as high as 376,059 % was observed at 8.27 T and 1.7 K.

    DOI： 10.1088/1742-6596/969/1/012134

    Web of Science

  14. Topological Josephson Junctions on Magnetically-Doped Topological Insulators International journal

    Yano, Rikizo, Koyanagi, Masao, Kashiwaya, Hiromi, Tsumura, Kohei, Hirose, Hishiro, Sasagawa, Takao, Kashiwaya, Satoshi

    Bulletin of the American Physical Society     2018

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    Authorship：Lead author   Language：English   Publishing type：Research paper (conference, symposium, etc.)   Publisher：American Physical Society  

  15. Narrow-band anisotropic electronic structure of ReS2 Reviewed International coauthorship International journal

    D. Biswas, Alex M. Ganose, R. Yano, J. M. Riley, L. Bawden, O. J. Clark, J. Feng, L. Collins-Mcintyre, M. T. Sajjad, W. Meevasana, T. K. Kim, M. Hoesch, J. E. Rault, T. Sasagawa, David O. Scanlon, P. D. C. King

    PHYSICAL REVIEW B   Vol. 96 ( 8 ) page： 085205 - 085205   2017.8

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER PHYSICAL SOC  

    We have used angle-resolved photoemission spectroscopy to investigate the band structure of ReS2, a transitionmetal dichalcogenide semiconductor with a distorted 1T crystal structure. We find a large number of narrow valence bands, which we attribute to the combined influence of structural distortion and spin-orbit coupling. We further show how this leads to a strong in-plane anisotropy of the electronic structure, with quasi-one-dimensional bands reflecting predominant hopping along zigzag Re chains. We find that this does not persist up to the top of the valence band, where a more three-dimensional character is recovered with the fundamental band gap located away from the Brillouin zone center along k(z). These experiments are in good agreement with our density-functional theory calculations, shedding light on the bulk electronic structure of ReS2, and how it can be expected to evolve when thinned to a single layer.

    DOI： 10.1103/PhysRevB.96.085205

    Web of Science

  16. Thermoelectric Properties in Single Crystals of Non-stoichiometric Compounds AgxCr2+y(S,Se)4 (x ~ 0.74, y ~ 0.42) Reviewed

    Rikizo Yano and Takao Sasagawa

    Science of Advanced Materials   Vol. 8   page： 2077   2016

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    Authorship：Lead author   Language：English  

  17. Crystal Growth and Properties of ACrX2 (A = Cu, Ag; X = S, Se) without a Secondary Phase Reviewed

    Rikizo Yano and Takao Sasagawa

    Crystal Growth and Design   Vol. 16   page： 5618   2016

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

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MISC 31

  1. Field Emission from Topological Insulator, BiSbTeSe<sub>2</sub>

    Nagai Taiga, Hitoshi Nakahara, Rikizo Yano, Takao Sasagawa, Satoshi Kashiwaya

    JSAP Annual Meetings Extended Abstracts   Vol. 2021.2   page： 1826 - 1826   2021.8

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    Language：Japanese   Publishing type：Research paper, summary (national, other academic conference)   Publisher：The Japan Society of Applied Physics  

    DOI： 10.11470/jsapmeeting.2021.2.0_1826

  2. Gate-Induced Superconductivity in 3R-MoS2 Bulk Single Crystals

    Hori Ryota, Tsumura Kohei, Yano Rikizo, Sasagawa Takao, Kashiwaya Satoshi

    Meeting Abstracts of the Physical Society of Japan   Vol. 75.1   page： 1522 - 1522   2020

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    Language：Japanese   Publishing type：Research paper, summary (national, other academic conference)   Publisher：The Physical Society of Japan  

    DOI： 10.11316/jpsgaiyo.75.1.0_1522

  3. Verification of unconventional superconducting by point contact

    Ito Seiichiro, Yamashita Taro, Yano Rikizo, Kashiwaya Satoshi

    Meeting Abstracts of the Physical Society of Japan   Vol. 75.1   page： 1520 - 1520   2020

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    Language：Japanese   Publishing type：Research paper, summary (national, other academic conference)   Publisher：The Physical Society of Japan  

    DOI： 10.11316/jpsgaiyo.75.1.0_1520

  4. Josephson Supercurrent of Magnetically-Doped Topological Insulator/Superconductor Junction

    Yamamoto Masahiro, Yano Rikizo, Hirose Hishiro T., Koyanagi Masao, Kashiwaya Hiromi, Sasagawa Takao, Tanaka Yukio, Kashiwaya Satoshi

    Meeting Abstracts of the Physical Society of Japan   Vol. 75.1   page： 1208 - 1208   2020

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    Language：Japanese   Publishing type：Research paper, summary (national, other academic conference)   Publisher：The Physical Society of Japan  

    DOI： 10.11316/jpsgaiyo.75.1.0_1208

  5. cuprate superconductor La<sub>(2-x)</sub>Sr<sub>x</sub>CuO<sub>4</sub> with high resolution ARPES

    Oda H., Iwasawa H., Ozawa S., Yano R., Kashiwaya S., Sasagawa T., Schwier E. F., Shimada K., Kimura A.

    Meeting Abstracts of the Physical Society of Japan   Vol. 75.1   page： 1327 - 1327   2020

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    Language：Japanese   Publishing type：Research paper, summary (national, other academic conference)   Publisher：The Physical Society of Japan  

    DOI： 10.11316/jpsgaiyo.75.1.0_1327

  6. Self-energy analysis in high-T<sub>c</sub> cuprate superconductor La<sub>(2-x)</sub>Sr<sub>x</sub>CuO<sub>4</sub> using high-resolution ARPES

    Oda H., Iwasawa H., Ozawa S., Yano R., Kashiwaya S., Sasagawa T., Schwier E. F., Shimada K., Kimura A.

    Meeting Abstracts of the Physical Society of Japan   Vol. 74.2   page： 1256 - 1256   2019

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    Language：Japanese   Publishing type：Research paper, summary (national, other academic conference)   Publisher：The Physical Society of Japan  

    DOI： 10.11316/jpsgaiyo.74.2.0_1256

  7. Magnetic field dependence of supercurrent in MoS<sub>2</sub>-based superconductor junctions with corner geometry

    Tsumura K., Hibi T., Yano R., Koyanagi M., Kashiwaya H., Ishiguro R., Sasagawa T., Kashiwaya S.

    Meeting Abstracts of the Physical Society of Japan   Vol. 74.2   page： 984 - 984   2019

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    Language：Japanese   Publishing type：Research paper, summary (national, other academic conference)   Publisher：The Physical Society of Japan  

    DOI： 10.11316/jpsgaiyo.74.2.0_984

  8. Search for Dark Matter Axions by Josephson Junctions

    Yamamoto Masahiro, Yano Rikizo, Hirose Hishiro, Sasagawa Takao, Kitajima Naoya, Naka Tatsuhiro, Tanaka Yukio, Kashiwaya Satoshi

    Meeting Abstracts of the Physical Society of Japan   Vol. 74.1   page： 1672 - 1672   2019

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    Language：Japanese   Publishing type：Research paper, summary (national, other academic conference)   Publisher：The Physical Society of Japan  

    DOI： 10.11316/jpsgaiyo.74.1.0_1672

  9. Superconducting Proximity effect on the Magnetically-Doped Topological insulator/ Superconductor Junctions

    Yano Rikizo, Tsumura Kohei, Hirose Hishiro T., Koyanagi Masao, Kashiwaya Hiromi, Asano Yasuhiro, Sasagawa Takao, Kashiwaya Satoshi

    Meeting Abstracts of the Physical Society of Japan   Vol. 74.1   page： 1422 - 1422   2019

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    Authorship：Lead author   Language：Japanese   Publishing type：Research paper, summary (national, other academic conference)   Publisher：The Physical Society of Japan  

    DOI： 10.11316/jpsgaiyo.74.1.0_1422

  10. Development of point-contact instrument for tunneling spectroscopy of unconventional superconductors

    Ito Seiichiro, Yano Rikizo, Yamashita Taro, Kashiwaya Satoshi

    Meeting Abstracts of the Physical Society of Japan   Vol. 74.2   page： 1388 - 1388   2019

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    Language：Japanese   Publishing type：Research paper, summary (national, other academic conference)   Publisher：The Physical Society of Japan  

    DOI： 10.11316/jpsgaiyo.74.2.0_1388

  11. 磁束量子導入時におけるトポロジカル絶縁体・超伝導体接合の輸送特性

    津村公平, 矢野力三, 小柳正男, 柏谷裕美, 廣瀬陽代, 江連大貴, 笹川崇男, 柏谷聡

    日本物理学会講演概要集(CD-ROM)   Vol. 73 ( 1 ) page： ROMBUNNO.25aB101‐12   2018.3

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    Language：Japanese   Publishing type：Research paper, summary (national, other academic conference)  

    J-GLOBAL

  12. 磁性ドープ3Dトポロジカル絶縁体/超伝導体接合における4π周期ジョセフソン電流の観測

    矢野力三, 小柳正男, 柏谷裕美, 津村公平, 廣瀬陽代, 浅野泰寛, 笹川崇男, 柏谷聡

    日本物理学会講演概要集(CD-ROM)   Vol. 73 ( 1 ) page： ROMBUNNO.25aB101‐11   2018.3

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    Language：Japanese  

    J-GLOBAL

  13. Transport Properties of the Magnetically-Doped Topological insulator/ Superconductor Junctions Depending on the Junction-Length

    Yano Rikizo, Tsumura Kohei, Koyanagi Masao, Kashiwaya Hiromi, Hirose Hishiro T., Asano Yasuhiro, Sasagawa Takao, Kashiwaya Satoshi

    Meeting Abstracts of the Physical Society of Japan   Vol. 73.2   page： 788 - 788   2018

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    Authorship：Lead author   Language：Japanese   Publishing type：Research paper, summary (national, other academic conference)   Publisher：The Physical Society of Japan  

    DOI： 10.11316/jpsgaiyo.73.2.0_788

  14. 磁性ドープしたトポロジカル絶縁体によるトポロジカルジョセフソン接合

    矢野力三, 小柳正男, 柏谷裕美, 津村公平, 廣瀬陽代, 五十嵐九四郎, 笹川崇男, 柏谷聡

    日本物理学会講演概要集(CD-ROM)   Vol. 72 ( 2 ) page： ROMBUNNO.23pB32‐4   2017.9

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    Language：Japanese  

    J-GLOBAL

  15. フラックス法によって成長されたWTe<sub>2</sub>の磁気抵抗

    津村公平, 矢野力三, 小柳正男, 柏谷裕美, 増渕覚, 町田友樹, 並木宏允, 笹川崇男, 柏谷聡

    日本物理学会講演概要集(CD-ROM)   Vol. 72 ( 2 ) page： ROMBUNNO.21pB32‐7   2017.9

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    Language：Japanese  

    J-GLOBAL

  16. Narrow-band anisotropic electronic structure of ReS2

    D. Biswas, Alex M. Ganose, R. Yano, J. M. Riley, L. Bawden, O. J. Clark, J. Feng, L. Collins-Mcintyre, M. T. Sajjad, W. Meevasana, T. K. Kim, M. Hoesch, J. E. Rault, T. Sasagawa, David O. Scanlon, P. D. C. King

    PHYSICAL REVIEW B   Vol. 96 ( 8 )   2017.8

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    Language：English   Publishing type：Internal/External technical report, pre-print, etc.   Publisher：AMER PHYSICAL SOC  

    We have used angle-resolved photoemission spectroscopy to investigate the band structure of ReS2, a transitionmetal dichalcogenide semiconductor with a distorted 1T crystal structure. We find a large number of narrow valence bands, which we attribute to the combined influence of structural distortion and spin-orbit coupling. We further show how this leads to a strong in-plane anisotropy of the electronic structure, with quasi-one-dimensional bands reflecting predominant hopping along zigzag Re chains. We find that this does not persist up to the top of the valence band, where a more three-dimensional character is recovered with the fundamental band gap located away from the Brillouin zone center along k(z). These experiments are in good agreement with our density-functional theory calculations, shedding light on the bulk electronic structure of ReS2, and how it can be expected to evolve when thinned to a single layer.

    DOI： 10.1103/PhysRevB.96.085205

    Web of Science

    arXiv

  17. 非磁性遷移金属プニクタイド単結晶における巨大磁気抵抗

    中野拓也, 高橋敬成, 大川顕次郎, 並木宏允, 矢野力三, 笹川崇男

    セラミックス基礎科学討論会講演要旨集   Vol. 55th   page： 94   2017.1

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    J-GLOBAL

  18. Large Magnetoresistance in Single Crystals of Nonmagnetic Transition-metal Pnictides

    Nakano Takuya, Takahashi Takanari, Ookawa Kenziro, Namiki Hiromasa, Yano Rikizo, Sasagawa Takao

    Meeting Abstracts of the Physical Society of Japan   Vol. 72 ( 0 ) page： 1414 - 1414   2017

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    Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.   Publisher：The Physical Society of Japan  

    &lt;p&gt;外部磁場の印加により電気抵抗が変化する磁気抵抗効果は、近年非磁性物質において極端に巨大な磁気抵抗(XMR)を示す物質が発見され注目が集まっている。本研究では第一原理計算による検討から遷移金属プニクタイドの化合物に着目し、単結晶試料を用いた系統的な評価からXMRの向上やその起源を探ることを目的とした。&lt;/p&gt;

  19. Thermoelectric Properties in Single Crystals of Non-Stoichiometric Compounds AgxCr2+y(S, Se)(4)(x similar to 0.74, y similar to 0.42) Reviewed

    Rikizo Yano, Takao Sasagawa

    Science of Advanced Materials   Vol. 8 ( 11 ) page： 2077-2081   2016.11

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    Searching for high performance thermoelectric materials, which can directly convert heat into electricity or vice versa, is still a great challenging issue especially for high-temperature heat energy recovering. Recently, AgCrSe2 has been reported to have ZT &gt; 1 at 773 K (ZT = (ST)-T-2/rho kappa) in spite of relatively low power factor (PF = S-2/rho similar to 2.5 mu W/cmK(2) at 773 K). The key factor of this high ZT in this material is attributed to ultralow thermal conductivity kappa due to phonon scattering by ionic conduction. In order to find a better material having disordered or mobile ions and higher PF simultaneously, we investigated single crystals of cousin compounds AgxCr2+y (S1-zSez)(4). The resistivity is found to drastically drop by the substitution of Se for S, while maintaining high Seebeck coefficient. Consequently, AgxCr2+ySe4 (analytically x = 0.70 and y = 0.15) was revealed as a promising candidate for high temperature thermoelectric material having about twice higher PF than that of AgCrSe2.

    DOI： 10.1166/sam.2016.2820

    Web of Science

  20. Crystal Growth and Intrinsic Properties of ACrX(2) (A = Cu, Ag; X = S, Se) without a Secondary Phase Reviewed

    Rikizo Yano, Takao Sasagawa

    CRYSTAL GROWTH & DESIGN   Vol. 16 ( 10 ) page： 5618-5623   2016.10

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    ACrX(2) (A = Cu, Ag; X = S, Se) compounds have a layered triangular structure similar to that of delafossites. In addition to a large variety of physical and chemical properties found in centrosymmetric delafossites, the broken inversion symmetry along the c-axis in this system leads to the emergence of additional functionalities such as piezoelectric, pyroelectric, and/or nonlinear optical properties. We found that the chemical vapor transport (CVT) technique using CrCl3 was the best growth method for ACrX(2). In the case of A = Cu, however, a standard CVT procedure always produced a certain amount of a secondary phase, identified as the CuCr2X4 spinet,which significantly affected magnetic and transport properties. By a modified CVT technique with appropriate heat treatments, pure single crystals of CuCrX2 were successfully grown. The resistivity of ACrX(2) was systematically changed by the combinations of A and X atoms. In contrast to metallic selenides, sulfides were confirmed to be insulators with giant anisotropy (10(2) approximate to 10(3)) between the out-of-plane (c-direction) and the in-plane (ab-plane) resistivity. In both X = S and Se, resistivity for A = Ag was higher than that for A = Cu. The drastic change in resistivity without carrier doping suggests that ionic conductivity and strong electron correlations play an important role in these materials.

    DOI： 10.1021/acs.cgd.6b00037

    Web of Science

  21. 21aCC-4 Organic Intercalation to Frustrated Triangular Lattice Antiferromagnets

    Tanaka Hiroto, Yano Rikizo, Sasagawa Takao

    Meeting Abstracts of the Physical Society of Japan   Vol. 71 ( 0 ) page： .   2016

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  22. 21aCC-5 Spin-Flop Transition in CrPS_4 Single Crystals

    Yano Rikizo, Sasagawa Takao

    Meeting Abstracts of the Physical Society of Japan   Vol. 71 ( 0 ) page： .   2016

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  23. Doping Effect on Single Crystals of Transition Metal Chalcogenides having CrX<sub>2</sub> (X = S,Se)

    Yano Rikizo, Sasagawa Takao

    Meeting Abstracts of the Physical Society of Japan   Vol. 71 ( 0 ) page： 1803-1803   2016

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    &lt;p&gt;近年，MoS2やWTe2などのCr族化合物において，スピン自由度を使ったデバイス応用や，巨大磁気抵抗を発現するような興味深い物性が報告されている．しかし，CrX2層を中心とした化合物においては，そのような測定に適する単結晶育成が難しかったり，CrX2が大気中不安定であったりするがゆえに合成が難しく，これまで詳しく調べられることがほとんどなかった．我々は昨年，CuCrX2単結晶からCrX2単結晶ことに成功したことを報告した．今回，これらのCrX2層をもつ物質に対して系統的にドーピングを行い，抵抗率が急激に変化する現象などを観測したのでこれを報告する．&lt;/p&gt;

  24. 16pCD-7 Crystal Growth and Characterization of Layered dichalcogenide Cr(Se, S)_2 Single Crystals

    Yano Rikizo, Sasagawa Takao

    Meeting Abstracts of the Physical Society of Japan   Vol. 70 ( 0 ) page： .   2015

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  25. 21pAH-1 Crystal Growth and Magnetic Properties of Layered Chalcogenides Having 1D chain

    Yano Rikizo, Sasagawa Takao

    Meeting Abstracts of the Physical Society of Japan   Vol. 70 ( 0 ) page： .   2015

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    Language：Japanese  

  26. 22aBB-3 Exploration of Ferromagnetic Insulators for a Heterojunction Quantum Anomalous Hall Effect

    Nasaka Nariaki, Yano Rikizo, Sasagawa Takao

    Meeting Abstracts of the Physical Society of Japan   Vol. 70 ( 0 ) page： .   2015

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  27. 29aXX-5 Crystal Growth and Physical Properties of Co_3Sn_2S_2 as a Candidate Half-metals (II)

    Tanaka Shimpei, Yano Rikizo, Kanou Manabu, Sasagawa Takao

    Meeting abstracts of the Physical Society of Japan   Vol. 68 ( 1 ) page： .   2013.3

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  28. 19pGA-15 Crystal Growth and Characterization of AgCrS_2 as a Candidate Multi-ferroics material

    Yano Rikizo, Sasagawa Takao

    Meeting abstracts of the Physical Society of Japan   Vol. 67 ( 2 ) page： .   2012.8

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  29. 21aPSB-46 Crystal Growth and Physical Properties of Co_3Sn_2S_2 as a Candidate Half-metals

    Tanaka Shimpei, Yano Rikizo, Kanou Manabu, Sasagawa Takao

    Meeting abstracts of the Physical Society of Japan   Vol. 67 ( 2 ) page： .   2012.8

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  30. 19pGA-15 Crystal Growth and Characterization of AgCrS_2 as a Candidate Multi-ferroics material

    Yano Rikizo, Sasagawa Takao

    Meeting Abstracts of the Physical Society of Japan   Vol. 67 ( 0 ) page： .   2012

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  31. 21aPSB-46 Crystal Growth and Physical Properties of Co_3Sn_2S_2 as a Candidate Half-metals

    Tanaka Shimpei, Yano Rikizo, Kanou Manabu, Sasagawa Takao

    Meeting Abstracts of the Physical Society of Japan   Vol. 67 ( 0 ) page： .   2012

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To the head of MISC.▲

Presentations 72

  1. Tailoring Magnetic Topological Materials for Superconducting Junctions Invited International coauthorship International conference

    Rikizo Yano

    The Fourteenth International Conference on the Science and Technology for Advanced Ceramics (STAC14)  2024.10.8  MSL-Institute of Science Tokyo and and National Institute for Materials Science (NIMS)

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    Event date： 2024.10

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Yokohama,   Country：Japan  

  2. Tailoring Magnetic Topological Materials for Superconducting Junctions Invited International conference

    Rikizo Yano

    The Fourteenth International Conference on the Science and Technology for Advanced Ceramics (STAC14)  2024.10.8 

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    Event date： 2024.10

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Yokohama,   Country：Japan  

  3. 物質材料研究から次の“常識”の創出へ～古くて新しい半導体材料からトポロジカル物質、超伝導材料まで～ Invited

    矢野力三

    NF Tech フォーラム 2022冬　Online  2022.2.2  株式会社NF回路設計ブロック

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    Event date： 2022.2

    Language：Japanese   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Venue：オンライン  

  4. 磁性トポロジカル絶縁体における新奇な超伝導近接効果 Invited

    矢野力三

    2021年度フロンティア材料研究所学術賞受賞記念講演会  2021.7.21  東京工業大学　フロンティア材料研究所

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    Event date： 2021.7

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：オンライン   Country：Japan  

  5. Proximity effect of magnetically doped topological insulator via conductance measurement Invited

    Rikizo Yano

    2021.3.14 

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    Event date： 2021.3

    Language：English   Presentation type：Oral presentation (invited, special)  

    Country：Japan  

  6. CaAg1-xPdxPにおける表面状態の理論的解析

    川端隆斗, 松島武琉, 土浦宏紀, 西垣星華, 谷口晴香, 矢野力三, 柏谷聡

    日本物理学会2025年春季大会  2025.3.19  日本物理学会

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    Event date： 2025.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  7. 希土類元素ドープしたトポロジカル絶縁体の結晶育成と評価

    石田元輝, 矢野力三, 笹川崇男, 谷口晴香, 柏谷聡

    日本物理学会2025年春季大会  2025.3.19  日本物理学会

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    Event date： 2025.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  8. Cr3S4型構造をもつカルコゲン化合物における類似の異常ホール効果

    矢野力三，奥田大貴，高橋智紀，笹川崇男，鈴木通人,谷口晴香，柏谷聡

    日本物理学会2025年春季大会  2025.3.19  日本物理学会

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    Event date： 2025.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  9. ノーダルライン半金属CaAgPの微小単結晶を用いた超伝導接合の作製

    日高大知, 松原直生, 西垣星華, 矢野力三, 谷口晴香, 岡本佳比古, 柏谷聡

    日本物理学会2025年春季大会  2025.3.20  日本物理学会

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    Event date： 2025.3

    Language：Japanese   Presentation type：Poster presentation  

    Venue：オンライン   Country：Japan  

  10. ノーダルライン半金属CaAg0.9Pd0.1Pの超伝導への静水圧効果

    谷口晴香, 西垣星華, 矢野晃我, 松原直生, 矢野力三, 川端隆斗, 土浦宏紀, 岡本佳比古, 柏谷聡

    日本物理学会2025年春季大会  2025.3.19  日本物理学会

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    Event date： 2025.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  11. インターカレーションと置換によるPdTe2の輸送特性への影響

    秋山寛汰, 矢野力三, 大川顕次郎, 笹川崇男, 谷口晴香, 柏谷聡

    日本物理学会2025年春季大会  2025.3.20  日本物理学会

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    Event date： 2025.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  12. ノーダルライン半金属CaAg0.9Pd0.1Pの超伝導への静水圧効果

    西垣星華，谷口晴香，矢野晃我，松原直生，矢野力三，川端隆斗，土浦宏紀，岡本佳比古，柏谷 聡

    第65回高圧討論会  2024.11.14  日本高圧学会

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    Event date： 2024.11

    Language：Japanese   Presentation type：Poster presentation  

    Venue：岩手   Country：Japan  

  13. 非従来型超伝導体の自発磁場の検出に向けたSQUID測定系の構築

    勅使河原充洋, 大野誠, 山森弘毅, 馬渡康徳, 矢野力三, 柏谷聡

    日本物理学会 第79回年次大会(2024年)  2024.9.18  日本物理学会

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    Event date： 2024.9

    Language：Japanese   Presentation type：Poster presentation  

    Venue：札幌   Country：Japan  

  14. 異常ホール効果を示す磁化の小さいフェリ磁性体の探索と単結晶育成

    矢野力三，奥田大貴，高橋智紀，笹川崇男，谷口晴香，柏谷聡

    日本物理学会 第79回年次大会(2024年)  2024.9.16  日本物理学会

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    Event date： 2024.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：札幌   Country：Japan  

  15. 複合遷移金属セレン化物フェリ磁性体の単結晶育成と異常ホール効果

    奥田大貴, 笹川崇男, 谷口晴香, 柏谷聡, 矢野力三

    日本物理学会 第79回年次大会(2024年)  2024.9.16  日本物理学会

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    Event date： 2024.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：札幌   Country：Japan  

  16. 磁性元素ドープBiSbTe2Seを用いた超伝導接合の作製

    林時温, 矢野力三, 谷口晴香, 廣瀬陽代, 笹川崇男, 柏谷聡

    日本物理学会 第79回年次大会(2024年)  2024.9.16  日本物理学会

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    Event date： 2024.9

    Language：Japanese   Presentation type：Poster presentation  

    Venue：札幌   Country：Japan  

  17. 超伝導接合特性を一軸圧下で測定するための技術開発 International coauthorship

    谷口晴香, G. Mattoni, 杉原陽, 新居煕将, 矢野力三, 池田敦俊, 前野悦輝, 柏谷聡

    日本物理学会 第79回年次大会(2024年)  2024.9.16  日本物理学会

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    Event date： 2024.9

    Language：Japanese   Presentation type：Poster presentation  

    Venue：札幌   Country：Japan  

  18. 単結晶ノーダルライン半金属CaAgPの輸送特性の異方性評価

    松原直生, 西垣星華, 矢野力三, 谷口晴香, 岡本佳比古, 柏谷聡

    日本物理学会 第79回年次大会(2024年)  2024.9.16  日本物理学会

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    Event date： 2024.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：札幌   Country：Japan  

  19. 磁性体単結晶に着目した新奇電子機能の開拓 Invited

    矢野力三

    2023年度 東海NFRW・応用物理学会東海地区若手チャプタージョイントWS  2023.10.20  応用物理学会東海支部、応用物理学会東海地区若手チャプター、応用物理学会名古屋大学スチューデントチャプター、応用物理学会九州地区若手チャプター

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    Event date： 2023.10

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：静岡県熱海  

  20. 超伝導体における時間反転対称性の決定に向けたSQUID測定系の構築

    勅使河原 充洋、大野 誠、山森 弘毅、馬渡 康徳、矢野 力三、柏谷 聡

    第84回応用物理学会秋季学術講演会  2023.9.20  日本応用物理学会

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    Event date： 2023.9

    Language：Japanese   Presentation type：Poster presentation  

    Venue：熊本城ホール等  

  21. Co2MnGaの異常ホール効果の結晶作製条件依存性

    岩瀬 勝彦、田口 勝久、柏谷 聡、矢野 力三

    第84回応用物理学会秋季学術講演会  2023.9.19  日本応用物理学会

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    Event date： 2023.9

    Language：Japanese   Presentation type：Poster presentation  

    Venue：熊本城ホール等  

  22. トポロジカル絶縁体FeドープBiSbTe2Seの磁場中輸送特性と表面電子状態

    反田剛, 矢野力三, 〇谷口晴香, 林時温, 中河西翔, 廣瀬陽代, 笹川崇男, 柏谷聡

    日本物理学会 第78回2023年次大会  2023.9.18  日本物理学会

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    Event date： 2023.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東北大学  

  23. 擬一次元構造を持つ遷移金属カルコゲナイドの単結晶育成と物性評価

    矢野力三, 高橋智紀, 奥田大貴, 谷口晴香, 笹川崇男, 柏谷聡

    日本物理学会 第78回2023年次大会  2023.9.19  日本物理学会

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    Event date： 2023.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東北大学  

  24. 超伝導ノーダルライン半金属PdドープCaAgPへのトンネル分光

    松原直生, 長坂翔太, 矢野力三, 三枝一茂, 岡本佳比古, 竹中康司, 柏谷聡

    日本物理学会 第78回2023年次大会  2023.9.18  日本物理学会

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    Event date： 2023.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東北大学  

  25. 時間反転対称性の破れた超伝導から発生する磁場の空間分布

    勅使河原 充洋、馬渡 康徳、山森 弘毅、矢野 力三、柏谷 聡

    2022年第83回応用物理学会秋季学術講演会  2022.9.21  応用物理学会

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    Event date： 2022.9

    Language：Japanese   Presentation type：Poster presentation  

    Venue：東北大学 川内北キャンパス  

  26. 電界効果トランジスタ用いたキャリア注入による磁性トポロジカル絶縁体Fe-BiSbTe2Seの表面状態の探索

    反田剛, 矢野力三, 廣瀬陽代, 笹川崇男, 柏谷聡

    日本物理学会2022年秋季大会  2022.9.13  日本物理学会

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    Event date： 2022.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京工業大学　大岡山キャンパス  

  27. d波超伝導体の結晶粒界接合におけるジョセフソン電流の計算

    酒森貴史, 畑野敬史, 矢野力三, 田仲由喜夫, 柏谷聡, 矢田圭司

    日本物理学会2022年秋季大会  2022.9.13  日本物理学会

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    Event date： 2022.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京工業大学　大岡山キャンパス  

  28. 超高速時間分解電子回折とシミュレーションによる超イオン導電体AgCrSe2の散漫散乱の研究

    千足勇介, 中村飛鳥, 下志万貴博, 古賀淳平, 矢野力三, 笹川崇男, 石坂香子

    日本物理学会2022年秋季大会  2022.9.14  日本物理学会

    　More details

    Event date： 2022.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京工業大学　大岡山キャンパス  

  29. ノーダルライン半金属CaAg0.9Pd0.1Pの超伝導へのポイントコンタクト

    松原直生, 長坂翔太, 矢野力三, 三枝一茂, 岡本佳比古, 竹中康司, 柏谷聡

    日本物理学会2022年秋季大会  2022.9.14  日本物理学会

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    Event date： 2022.9

    Presentation type：Oral presentation (general)  

    Venue：東京工業大学　大岡山キャンパス  

  30. Point contact spectroscopy of superconducting nodal line semimetal CaAg0.9Pd0.1P International conference

    Naoki Matsubara, Shota Nagasaka, Rikizo Yano, Kazushige Saigusa, Yusaku Shinoda, Yoshihiko Okamoto, Koshi Takenaka, and Satoshi Kashiwaya

    Conference on Low Temperature Physics (LT29)  2022.8.19 

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    Event date： 2022.8

    Language：English   Presentation type：Poster presentation  

    Venue：Sapporo, Japan  

  31. Magnetically Doped Topological Insulator with High Bulk insulation and its Superconducting Proximity Effects International conference

    Rikizo Yano, K.Tsumura, H. T. Hirose, T. Sasagawa, and S. Kashiwaya

    Conference on Low Temperature Physics (LT29)  2022.8.20 

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    Event date： 2022.8

    Language：English   Presentation type：Poster presentation  

    Venue：Sapporo, Japan  

  32. Evaluation of Magnetic Field Induced by Superconductors with Broken Time-Reveersal Symmetry International conference

    Mitsuhiro Teshigawara, Yasunori Mawatari, Hirotake Yamamori, Rikizo Yano, Satoshi Kashiwaya

    Conference on Low Temperature Physics (LT29)  2022.8.20 

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    Event date： 2022.8

    Language：English   Presentation type：Poster presentation  

    Venue：Sapporo, Japan  

  33. Andreev bound states and Doppler shift in La1.85Sr0.15CuO4/Au junctions International conference

    Hironori Teshima, Kang Donguhn, Takashi Sakamori, Rikizo Yano, Yuya Hiramatsu, Shun Tamura, Keiji Yada, Yukio Tanaka, Takao Sasagawa, Satoshi Kashiwaya

    Conference on Low Temperature Physics (LT29)  2022.8.20 

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    Event date： 2022.8

    Language：English   Presentation type：Poster presentation  

    Venue：Sapporo, Japan  

  34. 3K相を介したジョセフソン接合によるSr2RuO4の超伝導特性評価 International coauthorship

    山田貴弘, 矢野力三, 米澤進吾, Shahbaz Anwar, 前野悦輝, 柏谷聡

    日本物理学会第77回年次大会  2022.3.17  日本物理学会

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    Event date： 2022.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：岡山現地開催中止、全オンライン開催   Country：Japan  

  35. 不純物ドープしたMn3Snの電子状態

    林昌宏, 壁谷汰知, 木原俊哉, 矢野力三, 柏谷聡

    日本物理学会第77回年次大会  2022.3.16  日本物理学会

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    Event date： 2022.3

    Language：Japanese   Presentation type：Poster presentation  

    Venue：オンライン   Country：Japan  

  36. ノーダルライン半金属CaAgPにおけるPdドープの効果と表面キャリア制御

    長坂翔太, 矢野力三, 三枝一茂, 篠田祐作, 岡本佳比古, 竹中康司, 柏谷聡

    日本物理学会第77回年次大会  2022.3.16  日本物理学会

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    Event date： 2022.3

    Language：Japanese   Presentation type：Poster presentation  

    Venue：オンライン   Country：Japan  

  37. マイクロスケール領域の磁気測定に向けたSQUID装置の開発

    勅使河原充洋, 山森弘毅, 矢野力三, 柏谷聡

    日本物理学会第77回年次大会  2022.3.16  日本物理学会

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    Event date： 2022.3

    Language：Japanese   Presentation type：Poster presentation  

    Venue：オンライン   Country：Japan  

  38. Mn3Snの異常ホール効果へのSnサイト置換の影響

    壁谷汰知, 木原俊哉, 林昌宏, 矢野力三, 柏谷聡

    日本物理学会第77回年次大会  2022.3.16  日本物理学会

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    Event date： 2022.3

    Language：Japanese   Presentation type：Poster presentation  

    Venue：オンライン   Country：Japan  

  39. トポロジカル絶縁体表面を介した超伝導近接効果の磁場応答 International coauthorship

    矢野力三, 津村公平, 廣瀬陽代, Stolyarov Vasily, 田仲由喜夫, 笹川崇男, 柏谷聡

    日本物理学会第77回年次大会  2022.3.15  日本物理学会

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    Event date： 2022.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：岡山現地開催中止、全オンライン開催   Country：Japan  

  40. イオンゲートを用いた磁性トポロジカル絶縁体FeドープBiSbTe2Seの表面状態の制御

    反田剛, 矢野力三, 廣瀬陽代, 笹川崇男, 柏谷聡

    日本物理学会第77回年次大会  2022.3.16  日本物理学会

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    Event date： 2022.3

    Language：Japanese   Presentation type：Poster presentation  

    Venue：オンライン   Country：Japan  

  41. ワイル半金属Mn3Snにおける表面不純物由来の新奇異常ホール効果

    木原俊哉, 鈴木通人, 矢野力三, 柏谷聡

    日本物理学会第77回年次大会  2022.3.16  日本物理学会

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    Event date： 2022.3

    Language：Japanese   Presentation type：Poster presentation  

    Venue：オンライン   Country：Japan  

  42. Transport Properties of the Sr2RuO4/Ru/Nb Josephson Junction International coauthorship

    Takahiro Yamada, Rikizo Yano, Shingo Yonezawa, Shahbaz Anwar, Yoshiteru Maeno, Satoshi Kashiwaya

    Oxide Superspin (OSS2021) Workshop  2021.12.15  OXIDE SUPERSPIN INTERNATIONAL NETWORK

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    Event date： 2021.12

    Language：English   Presentation type：Poster presentation  

    Venue：Kyoto, Japan   Country：Japan  

  43. Magnetically Doped Topological Insulator and its Superconducting Proximity Effects International coauthorship International conference

    R. Yano, V. S. Stolyarov, H. T. Hirose, K. Tsumura, M. Yamamoto, H. Kashiwaya, T. Sasagawa, S. Kashiwaya

    International Conference on Materials and Systems for Sustainability (ICMaSS2021)  2021.11.5  IMaSS, Nagoya univ.

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    Event date： 2021.11

    Language：English   Presentation type：Poster presentation  

    Venue：On-line   Country：Japan  

  44. トポロジカル物質における新奇超伝導状態実現への取組み International coauthorship

    矢野力三,廣瀬陽代, V. Stolyarov ,前野悦輝, 岡本佳比古, 竹中康司, 田仲由喜夫, 笹川崇男, 柏谷聡

    東海 NFRW・東海地区若手チャプタージョイントワークショップ  2021.10.19  応用物理学会 東海 NFRW・東海地区若手チャプター

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    Event date： 2021.10

    Language：Japanese   Presentation type：Poster presentation  

    Venue：名古屋   Country：Japan  

  45. Pd置換したノーダルライン半金属CaAgPにおける表面キャリア密度と超伝導

    長坂翔太, 矢野力三, 三枝一茂, 篠田祐作, 岡本佳比古, 竹中康司, 柏谷聡

    日本物理学会2021年秋季大会  2021.9.22  日本物理学会

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    Event date： 2021.9

    Language：Japanese   Presentation type：Poster presentation  

    Venue：オンライン   Country：Japan  

  46. AgCrSe2単結晶における異常な磁気輸送特性

    後藤大望, 矢野力三, 笹川崇男, 柏谷聡

    日本物理学会2021年秋季大会  2021.9.22  日本物理学会

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    Event date： 2021.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  47. 磁性ドープ三次元トポロジカル絶縁体Fe-BiSbTe2Seの表面輸送特性

    反田剛, 矢野力三, 廣瀬陽代, 笹川崇男, 柏谷聡

    日本物理学会2021年秋季大会  2021.9.22  日本物理学会

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    Event date： 2021.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  48. Sr2RuO4/Nbジョセフソン接合の作製 International coauthorship

    山田貴弘, 矢野力三, 米澤進吾, Shahbaz Anwar, 前野悦輝, 柏谷聡

    日本物理学会2021年秋季大会  2021.9.21  日本物理学会

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    Event date： 2021.9

    Language：Japanese   Presentation type：Poster presentation  

    Venue：オンライン   Country：Japan  

  49. ワイル反強磁性物質Mn3Snの中低温における異常ホール効果

    木原俊哉, 矢野力三, 片山尚幸, 須藤裕之, 柏谷聡

    日本物理学会2021年秋季大会  2021.9.21  日本物理学会

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    Event date： 2021.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  50. 不純物ドープしたMn3Snにおける異常ホール効果

    壁谷汰知, 木原俊哉, 矢野力三, 須藤裕之, 柏谷聡

    日本物理学会2021年秋季大会  2021.9.21  日本物理学会

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    Event date： 2021.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  51. 磁性トポロジカル絶縁体接合における近接効果の磁気トラップを利用した制御

    矢野力三, 津村公平, 廣瀬陽代, Stolyarov Vasily, 柏谷裕美, 田仲由喜夫, 笹川崇男, 柏谷聡

    日本物理学会2021年秋季大会  2021.9.21  日本物理学会

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    Event date： 2021.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  52. トポロジカル絶縁体（BiSbTeSe2）からの電界放出

    永井 大賀、中原 仁、矢野 力三、笹川 崇男、柏谷 聡

    第82回応用物理学会秋季学術講演会  2021.9.13  応用物理学会

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    Event date： 2021.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  53. Anomalous Magnetic Transport Properties of AgCrSe Single Crystals2 International conference

    Hiromi Goto, Rikizo Yano, Takao Sasagawa, and Satoshi Kashiwaya

    The 12th International Conference on the Science and Technology for Advanced Ceramics (STAC-12)  2021.7.7  Organization Commitee of STAC-12

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    Event date： 2021.7

    Language：English   Presentation type：Poster presentation  

    Venue：On-line   Country：Japan  

  54. Magnetically Doped Three Dimensional Topological Insulator and its Superconducting Proximity Effects International coauthorship International conference

    R. Yano, V. S. Stolyarov, H. T. Hirose ,K. Tsumura, M. Yamamoto, Y. Tanaka, H. Kashiwaya, Y. Asano, T. Sasagawa, S. Kashiwaya

    The 12th International Conference on the Science and Technology for Advanced Ceramics (STAC-12)  2021.7.6  Organization Commitee of STAC-12

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    Event date： 2021.7

    Language：English   Presentation type：Oral presentation (general)  

    Venue：On-line   Country：Japan  

  55. Field Effects of Pd Doped CaAgP as a Nodal-Line semimetal International conference

    Shota Nagasaka, Rikizo Yano, Kazushige Saigusa, Yoshihiko Okamoto, Koshi Takenaka, and Satoshi Kashiwaya

    The 12th International Conference on the Science and Technology for Advanced Ceramics (STAC-12)  2021.7.7  Organization Commitee of STAC-12

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    Event date： 2021.7

    Language：English   Presentation type：Poster presentation  

    Venue：On-line   Country：Japan  

  56. Field Emission from Topological Insulator BiSbTeSe2 International conference

    Taiga Nagai, Hitoshi Nakahara, Rikizo Yano, Takao Sasagawa, and Satoshi Kashiwaya

    The 12th International Conference on the Science and Technology for Advanced Ceramics (STAC-12)  2021.7.7  Organization Commitee of STAC-12

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    Event date： 2021.7

    Language：English   Presentation type：Poster presentation  

    Venue：On-line   Country：Japan  

  57. Surface Transport Properties of Magnetically-Doped Three-Dimensional Topological Insulator Fe-BiSbTe2Se International conference

    Tsuyoshi Tanda, Rikizo Yano, Hishiro T. Hirose, Takao Sasagawa, and Satoshi Kashiwaya

    The 12th International Conference on the Science and Technology for Advanced Ceramics (STAC-12)  2021.7.7  Organization Commitee of STAC-12

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    Event date： 2021.7

    Language：English   Presentation type：Poster presentation  

    Venue：On-line   Country：Japan  

  58. Unusual Proximity Effect on a Magnetic Topological Insulator Tuned by Magnetization International coauthorship International conference

    R. Yano, M. Yamamoto, K. Tsumura, H. T. Hirose , S. Tamura, H. Kashiwaya, V. S. Stolyarov, Y. Tanaka, T. Sasagawa, S. Kashiwaya

    Bound states in hybrid superconductor nanostructures: CMD 29 online series  2021.6.29  Jointly organized by the Institute of Physics(IOP) and The European Physical Society (EPS)

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    Event date： 2021.6

    Language：English   Presentation type：Oral presentation (general)  

    Venue：On-line   Country：United Kingdom  

  59. Superconducting Proximity Effect on a Magnetically Doped Topological Insulator Controlled by Magnetization International coauthorship International conference

    R. Yano, M. Yamamoto, K. Tsumura, H. T. Hirose ,V. S. Stolyarov, Y. Tanaka, H. Kashiwaya, Y. Asano, T. Sasagawa, S. Kashiwaya

    American Physical Society 2020 March Meeting  2021.3.15  American Physical Society

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    Event date： 2021.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：On-line   Country：United States  

  60. 超イオン導電体AgCrSe2におけるAgイオンの超高速時間応答

    千足勇介，古賀淳平，中村飛鳥，矢野力三，下志万貴博，笹川崇男，石坂香子

    日本物理学会第76回年次大会  2021.3.15  日本物理学会

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    Event date： 2021.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン  

  61. Pd置換したノーダルライン半金属CaAgPにおける電界効果と超伝導

    長坂翔太，矢野力三, 三枝一茂，岡本佳比古，竹中康司，柏谷聡

    日本物理学会第76回年次大会  2021.3.14  日本物理学会

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    Event date： 2021.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン  

  62. ジョセフソン接合を用いたアクシオン探索のための磁場の数値計算

    高野優之，馬渡康徳，矢野力三,　北嶋直弥，田口勝久，中竜大，柏谷聡

    日本物理学会第76回年次大会  2021.3.15 

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    Event date： 2021.3

    Language：Japanese   Presentation type：Oral presentation (general)  

  63. Proximity Effect on a Magnetic Topological Insulator Controlled by Magnetization International coauthorship International conference

    R. Yano, M. Yamamoto, K. Tsumura, H. T. Hirose, H. Kashiwaya, Y. Asano, V. Stolyarov, T. Sasagawa, S. Kashiwaya

    OSS Online Project Meeting (SPICE‐OSS2020)  2020.10.28 

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    Event date： 2020.10

    Language：English  

    Venue：On-line  

  64. Superconducting Proximity Effect on a Magnetic Topological Insulator Controlled by Magnetization International coauthorship International conference

    R. Yano, M. Yamamoto, K. Tsumura, H. T. Hirose, H. Kashiwaya, Y. Asano, V. Stolyarov, T. Sasagawa, S. Kashiwaya

    Topological Superconductivity in Quantum Materials   2020.10.21  The Spin Phenomena Interdisciplinary Center

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    Event date： 2020.10

    Language：English   Presentation type：Poster presentation  

    Venue：On-line   Country：Germany  

  65. ジョセフソン接合におけるアクシオンを考慮した磁場の数値計算

    高野優之, 馬渡康徳, 矢野力三, 北嶋直弥, 田口勝久, 柏谷聡

    日本物理学会2020年秋季大会  2020.9.16  日本物理学会

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    Event date： 2020.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン  

  66. 磁性トポロジカル絶縁体表面を介した近接効果の制御 International coauthorship

    矢野力三, 津村公平, 廣瀬陽代, 山本將裕, Stolyarov Vasily, 柏谷裕美, 田仲由喜夫, 浅野泰寛, 笹川崇男, 柏谷聡

    日本物理学会2020年秋季大会  2020.9.9  日本物理学会

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    Event date： 2020.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン   Country：Japan  

  67. ワイル反強磁性体Mn3Snの異常ホール効果の評価

    木原俊哉, 矢野力三, 柏谷聡

    日本物理学会2020年秋季大会  2020.9.11  日本物理学会

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    Event date： 2020.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン  

  68. 高分解能ARPESを用いたLa(2-x)SrxCuO4の多体相互作用の評価 International coauthorship

    尾田拓之慎, 岩澤英明, 小澤秀介, 矢野力三, 柏谷聡, 笹川崇男, Shiv Kumar, E. F. Schwier, 島田賢也, 橋本信, Donghui Lu, 木村昭夫

    日本物理学会2020年秋季大会  2020.9.10 

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    Event date： 2020.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン  

  69. 磁性3Dトポロジカル絶縁体の表面状態を介した近接効果 International coauthorship

    矢野力三, 津村公平, 廣瀬陽代, 山本將裕, Stolyarov Vasily, 小柳正男, 柏谷裕美, 田仲由喜夫, 浅野泰寛, 笹川崇男, 柏谷聡

    日本物理学会第75回年次大会  2020.3  日本物理学会

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    Event date： 2020.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：名古屋(COVIT-19で現地開催中止)   Country：Japan  

  70. Superconducting Proximity Effect in Magnetically-Doped Topological Insulators using Bulk Single Crystals International coauthorship International conference

    R. Yano, K. Tsumura, H. T. Hirose, M. Yamamoto, A. Kudriashov, M. Koyanagi, H. Kashiwaya, Y. Asano, V. Stolyarov, T. Sasagawa, S. Kashiwaya

    American Physical Society 2020 March Meeting  2020.3  American Physical Society

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    Event date： 2020.3

    Language：English  

    Venue：Denver, CO (Cancelled due to COVIT-19 and changed to on-line slide presentation)   Country：United States  

  71. Transport Properties of Magnetic Topological Insulators and its Superconducting Proximity Effects International conference

    R. Yano，K. Tsumura, H. T. Hirose, M. Yamamoto, M. Koyanagi，H. Kashiwaya，Y. Asano, T. Sasagawa, S. Kashiwaya

    International Conference on Topological Materials Science 2019 (TopoMat2019)  2019.12 

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    Event date： 2019.12

    Language：English   Presentation type：Poster presentation  

    Venue：Kyoto, Japan   Country：Japan  

  72. Josephson Junctions on Magnetically-Doped 3D-Topological Insulators International conference

    Rikizo Yano, Masao Koyanagi, Hiromi Kashiwaya, Kohei Tsumura Hishiro Hirose, Takao Sasagawa, Satoshi Kashiwaya

    Workshop 2018 "Majorana Fermions and Topological Materials Science"  2018.7.23 

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    Event date： 2018.7

    Language：English   Presentation type：Poster presentation  

    Venue：Erice, Italy   Country：Italy  

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Research Project for Joint Research, Competitive Funding, etc. 4

  1. 磁性層状化合物における新奇電子物性の開拓と超伝導近接効果

    Grant number：44  2024.4 - 2025.3

    2024年度共同利用研究   一般B

    矢野力三

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    Authorship：Principal investigator 

  2. 磁性層状化合物における新奇電子物性の開拓と超伝導近接効果

    Grant number：39  2023.4 - 2024.3

    2023度共同利用研究  一般B

    矢野　力三

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    Authorship：Principal investigator  Grant type：Other

  3. 磁性層状化合物における新奇電子物性の開拓と超伝導近接効果

    Grant number：46  2022.4 - 2023.3

    2022度共同利用研究 

    矢野力三

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    Authorship：Principal investigator  Grant type：Other

  4. 新奇超伝導状態観測に向けた層状物質の単結晶育成と物性評価

    Grant number：51.1  2020.4 - 2021.3

    2020年度共同利用研究  一般B

    矢野力三

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    Authorship：Principal investigator  Grant type：Other

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KAKENHI (Grants-in-Aid for Scientific Research) 4

  1. Spatial Surface State Tuning by Three-Dimensional Magnetic Topological Insulators

    Grant number：21K13854  2021.4 - 2024.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Early-Career Scientists

    Yano Rikizo

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    Authorship：Principal investigator  Grant type：Competitive

    Grant amount：\4550000 （ Direct Cost: \3500000 、 Indirect Cost：\1050000 ）

    Topological materials are expected to have unique surface states, which can be applied to next-generation electronic devices, such as spintronics devices and future quantum computing. Although those surface states are topologically protected and robust against external fluctuation, they are potentially controlled by using magnetization. We focused on magnetically doped topological insulators (TIs) as a promising candidate material for this purpose and evaluated their surface state in detail. Although we did not reach the step of controlling the surface state by magnetization, we revealed detailed transport properties of the magnetic TI candidates and found other new candidates for magnetic topological semimetals, of which surface states may be controlled in the future. Furthermore, we found unconventional superconductivity on the surface of topological semimetals (nodal semimetal CaAg1-xPdxP).

  2. 対称性を活用した遷移金属カルコゲン化合物における電子機能の開拓

    Grant number：15J11901  2015.4 - 2017.3

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費

    矢野 力三

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    Authorship：Principal investigator  Grant type：Competitive

    Grant amount：\2170000 （ Direct Cost: \1900000 、 Indirect Cost：\270000 ）

    本研究では，対称性を活用して興味深い物性機能をもつ物質の開拓や，これまでにない新機能をもつ物質の探索を行ってきた．そのためには，物質の本質的特性を調べられる純良な単結晶育成が必要不可欠である．本研究では主に５つの化合物（ACrX2, AgxCr2+yX4, CrX2, CrPS4, ReX2: A = Cu, Ag; X = S, Se）の純良な単結晶育成法の確立と，それらの本質的物性特性の解明を行ってきた．
    ACrX2はスピンの対称性の破れに加えて，空間の対称性も破れている物質であるが，それに加えて本研究によって電子同士のクーロン力の影響がとても強く働く「強相関電子系」であることを明らかにした．これらに起因する物性としてユニークな磁性と誘電特性が共存するマルチフェッロイック特性を有すること，さらに高温で熱電材料として本質的に実用化の目安であるZT = 1をもつ可能性などを指摘してきた．
    このACrX2に局所的空間対称性の乱れが導入された不定比性化合物AgxCr2+yX4の大型単結晶育成に成功し，その特性を初めて系統的に明らかにした．この物質では不定比性によって特性をチューニングできる可能性を指摘した．さらに，代表的な熱電材料であるBi2Te3をも凌駕する極めて低い熱伝導率をもつことが明らかにし，その結果，高温の熱電特性として，実用化の目安の倍近くの特性(ZT ～2）を持ちうることを見出した．
    また，ACrX2を基にした合成経路から，近年脚光を浴び始めているCrSe2や，数十年間誰も合成できなかったCrS2の単結晶を得ることにも成功した．これらは，ほとんど例のない興味深い電子軌道秩序や軌道の液体状態が実現する可能性があることを指摘した．
    他にもCrX2層を持たないCrPS4やReS2にも着目し，低対称性による特異なスピン秩序や興味深い1次元的電子状態を持つことも見出した．

  3. インフォマティックスの先をゆき応用も志向したトポロジカル電子材料の開拓

    Grant number：21H04652  2021.4 - 2026.3

    日本学術振興会  科学研究費助成事業  基盤研究(A)

    笹川 崇男, 黒田 健太, 矢野 力三

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    Authorship：Coinvestigator(s)  Grant type：Competitive

    Grant amount：\5200000 （ Direct Cost: \4000000 、 Indirect Cost：\1200000 ）

    トポロジカル電子状態への新概念の提案が理論から続く中、新物質の探索にはマテリアルズ・インフォマティクス（ＭＩ）が導入され始めている。この潮流の中で、世界最前線の実験研究を推進しつつ、トポロジカル物質科学からトポロジカル材料工学へと学理のフェーズを変えるために、「第一原理計算」「純良単結晶育成」「先端分光計」「極限環境物性評価」を武器に、ＭＩを活用しつつ、更にその一歩先をゆく独自の物質・物性・機能の開拓を行う。
    トポロジカル電子状態への新概念の提案が理論から続く中、新物質の探索にはマテリアルズ・インフォマティクス（ＭＩ）が導入され始めている。この潮流の中で、世界最前線の実験研究を推進しつつ、トポロジカル物質科学からトポロジカル材料工学へと学理のフェーズを変えるために、「第一原理計算」「純良単結晶育成」「先端分光計」「極限環境物性評価」を武器に、ＭＩを活用しつつ、更にその一歩先をゆく独自の物質・物性・機能の開拓を行った。
    令和5年度の成果としては、① 特定の結晶面にのみトポロジカル表面状態が出現する「弱いトポロジカル絶縁体」について、室温での実用化に適したバルクのエネルギーギャップが大きい物質の開発に成功したこと、② 温度で構造相転移する物質系を対象として、実験検証が進んでいない高温相を室温で安定化させて、トポロジカル電子状態を実験解明することに成功したこと、③ 超伝導とトポロジカル性が共存する複数の物質について、構造多形の制御や化学ドーピングなどの実験手法を駆使しながら物性評価することが進んだこと、などが特筆される。
    学会発表や論文発表にまで至った本年度に扱った物質は、絶縁体/半導体(MoS2, MoSe2, WS2, WSe2, WTe2, ReSe2, TiS2, h-BN, In2Se3, Fe-BiSbTe2Se, Bi2Se3, TlBiSe2, NiS2, TlBiSe2, WOx)から半金属(CaAg0.9Pd0.1P, HgCr2Se4, ZrSiS, HfSiS)、磁性体(Fe5-xGeTe2, Co2FeSi, Co2MnGa, NdBi, PdCrO2) 、超伝導体(Td-MoTe2, 2M-WS2, NbTe2, La1.85Sr0.15CuO4, TaSe2, Fe(S,Se))までと、多岐にわたった。
    絶縁体/半導体(MoS2, MoSe2, WS2, WSe2, WTe2, ReSe2, TiS2, h-BN, In2Se3, Fe-BiSbTe2Se, Bi2Se3, TlBiSe2, NiS2, TlBiSe2, WOx)から半金属(CaAg0.9Pd0.1P, HgCr2Se4, ZrSiS, HfSiS)、磁性体(Fe5-xGeTe2, Co2FeSi, Co2MnGa, NdBi, PdCrO2) 、超伝導体(Td-MoTe2, 2M-WS2, NbTe2, La1.85Sr0.15CuO4, TaSe2, Fe(S,Se))までの多岐にわたる物質を、高品質な単結晶試料として開発し、それぞれについて学会発表や論文発表を行うことができた。
    研究計画遂行への、「マテリアルズ・インフォマティクスを活用しつつ、そのスキームだけでは探索・開拓することが難しい新しい種類のトポロジカル電子物質を、独自の研究戦略をもとに開発してゆく」という方針・方法論の有効性を実証することができているので、引き続き、この勢いを維持・増強してゆく。
    第一原理計算を用いた物質選定、純良単結晶試料を準備しての物質開拓や物性評価、角度分解光電子分光法による電子構造の直接観察、マイクロフレーク単結晶を用いたデバイス作製による性能評価や機能実証といった、各チームのもつ研究の武器を最大限に活用し、相補的な役割分担のもとで研究計画を推進してゆく。

  4. Explorarion of novel device technology based on topological electronic states

    Grant number：16H03847  2016.4 - 2019.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    Sasagawa Takao, YANO Rikizo, OKAWA Kenjiro, MISAWA Tetsuro, MURASE Masayuki, HANAGURI Tetsuo, ISHIZAKA Kyoko

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    Grant type：Competitive

    Because of their novel quantum states, topological electronic materials are promising components for next generation electronics such as spin devices and quantum computers. We developed both new compounds and novel electronic functionality within a new class of materials called "topological insulators, topological semimetals, and topological superconductors". With regard to materials, phenomena, and functions, several unexpected discoveries were made, which were puplised as 45 articles in high-impact-factor journals, including 5 articles in Nature and sister journals.

To the head of KAKENHI (Grants-in-Aid for Scientific Research).▲
 

Teaching Experience (On-campus) 24

  1. 物理工学実験第１

    2022

  2. 物理工学実験第３

    2021

  3. ナノ構造解析学セミナー2E

    2021

  4. 物理工学実験第２

    2021

  5. ナノ構造解析学セミナー2D

    2021

  6. ナノ構造解析学セミナー2A

    2021

  7. ナノ構造解析学セミナー2B

    2021

  8. ナノ構造解析学セミナー2C

    2021

  9. ナノ構造解析学特別実験・演習B

    2021

  10. 応用物理学特別輪講（ナノ構造解析学）A

    2021

  11. 応用物理学特別輪講（ナノ構造解析学）B

    2021

  12. ナノ構造解析学セミナー1A

    2021

  13. ナノ構造解析学セミナー1B

    2021

  14. ナノ構造解析学セミナー1C

    2021

  15. ナノ構造解析学セミナー1D

    2021

  16. ナノ構造解析学特別実験・演習A

    2021

  17. ナノ構造解析学特別実験・演習A

    2020

  18. ナノ構造解析学特別実験・演習B

    2020

  19. ナノ構造解析学セミナー1D

    2020

  20. ナノ構造解析学セミナー1C

    2020

  21. 応用物理学特別輪講（ナノ構造解析学）A

    2020

  22. 応用物理学特別輪講（ナノ構造解析学）B

    2020

  23. ナノ構造解析学セミナー1A

    2020

  24. ナノ構造解析学セミナー1B

    2020

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To the head of Teaching Experience (On-campus).▲

Teaching Experience (Off-campus) 4

  1. Physical Science and Engineering Laboratory 2

    2022.4 （Nagoya University）

  2. Physical Science and Engineering Tutorial 1

    2022.4 （Nagoya University）

  3. Physical Science and Engineering Laboratory 3

    2022.4 （Nagoya University）

  4. 物理工学実験第３

    2021 （Nagoya University）

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    Level：Undergraduate (specialized) 

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Social Contribution 1

  1. 物質材料研究から次の“常識”の創出へ～古くて新しい半導体材料からトポロジカル物質、超伝導材料まで～

    Role(s)：Lecturer

    株式会社エヌエフ回路設計ブロック  NF Tech フォーラム 2022冬　Online  2022.2

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