研究者詳細 - 山川　洋一

論文 - 山川　洋一

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Charge-loop current order and Z3 nematicity mediated by bond order fluctuations in kagome metals 査読有り国際誌

Rina Tazai, Youichi Yamakawa, Hiroshi Kontani

Nature Communications 14 巻頁： 7845-1 - 7845-9 2023年11月

記述言語：英語掲載種別：研究論文（学術雑誌）

Recent experiments on geometrically frustrated kagome metal AV3Sb5 (A = K, Rb, Cs) have revealed the emergence of the charge loop current (cLC) order near the bond order (BO) phase. However, the origin of the cLC and its interplay with other phases have been uncovered. Here, we propose a novel mechanism of the cLC state, by focusing on the BO phase common in kagome metals. The BO fluctuations in kagome metals, which emerges due to the Coulomb interaction and the electron-phonon coupling, mediate the odd-parity particle-hole condensation that gives rise to the topological current order. Furthermore, the predicted cLC+BO phase gives rise to the Z3-nematic state in addition to the giant anomalous Hall effect. The present theory predicts the close relationship between the cLC, the BO, and the nematicity, which is significant to understand the cascade of quantum electron states in kagome metals. The present scenario provides a natural understanding.

DOI： 10.1038/s41467-023-42952-6

Mechanism of exotic density-wave and beyond-Migdal unconventional superconductivity in kagome metal AV(3)Sb(5) (A = K, Rb, Cs) 査読有り国際誌

Tazai Rina, Yamakawa Youichi, Onari Seiichiro, Kontani Hiroshi

SCIENCE ADVANCES 8 巻 ( 13 ) 頁： eabl4108-1 - eabl4108-9 2022年4月

Odd-parity spin-loop-current order mediated by transverse spin fluctuations in cuprates and related electron systems 査読有り国際誌

Kontani Hiroshi, Yamakawa Youichi, Tazai Rina, Onari Seiichiro

PHYSICAL REVIEW RESEARCH 3 巻 ( 1 ) 頁： 013127-1 - 013127-13 2021年2月

Nematicity and Magnetism in FeSe and Other Families of Fe-Based Superconductors 査読有り国際誌

Yamakawa Youichi, Onari Seiichiro, Kontani Hiroshi

PHYSICAL REVIEW X 6 巻 ( 2 ) 頁： 021032-1 - 021032-15 2016年6月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

Nematicity and magnetism are two key features in Fe-based superconductors, and their interplay is one of the most important unsolved problems. In FeSe, the magnetic order is absent below the structural transition temperature Tstr=90 K, in stark contrast to the fact that the magnetism emerges slightly below Tstr in other families. To understand such amazing material dependence, we investigate the spin-fluctuation-mediated orbital order (nxz≠nyz) by focusing on the orbital-spin interplay driven by the strong-coupling effect, called the vertex correction. This orbital-spin interplay is very strong in FeSe because of the small ratio between the Hund’s and Coulomb interactions (J¯/U¯) and large dxz, dyz-orbital weight at the Fermi level. For this reason, in the FeSe model, the orbital order is established irrespective of the fact that the spin fluctuations are very weak, so the magnetism is absent below Tstr. In contrast, in the LaFeAsO model, the magnetic order appears just below Tstr both experimentally and theoretically. Thus, the orbital-spin interplay due to the vertex correction is the key ingredient in understanding the rich phase diagram with nematicity and magnetism in Fe-based superconductors in a unified way.

DOI： 10.1103/PhysRevX.6.021032

Web of Science

Sign-Reversing Orbital Polarization in the Nematic Phase of FeSe due to the C-2 Symmetry Breaking in the Self-Energy 査読有り

Onari Seiichiro, Yamakawa Youichi, Kontani Hiroshi

PHYSICAL REVIEW LETTERS 116 巻 ( 22 ) 頁： 227001-1 - 227001-6 2016年6月

Odd-parity bond order and induced nonreciprocal transport in the kagome metal CsTi3Bi5 driven by quantum interference 査読有り国際誌

J. Huang, Y. Yamakawa, R. Tazai, T. Morimoto, and H. Kontani

Physical Review B 111 巻頁： 125153-1 - 125153-13 2025年3月

Giant impurity effects on charge loop current order states in kagome metals 査読有り

S. Nakazawa, R. Tazai, Y. Yamakawa, S. Onari, and H. Kontani

Physical Review B 111 巻頁： 075161-1 - 075161-10 2025年2月

Real-Space Loop Current Pattern in Time-Reversal-Symmetry Breaking Phase in Kagome Metals 査読有り

Shimura, K; Tazai, R; Yamakawa, Y; Onari, S; Kontani, H

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 93 巻 ( 3 ) 頁： 033704-1 - 033704-5 2024年3月

Superconductivity in Ternary Zirconium Telluride Zr6MTe2 with 3d Transition Metals 査読有り

Matsumoto, H; Yamakawa, Y; Okuma, R; Nishio-Hamane, D; Okamoto, Y

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 93 巻 ( 2 ) 頁： 023705-1 - 023705-5 2024年2月

Superconductivity in Ternary Germanide ScPdGe and Silicide ScPdSi 査読有り

Shinoda, Y; Okamoto, Y; Yamakawa, Y; Takatsu, H; Kageyama, H; Hirai, D; Takenaka, K

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 93 巻 ( 2 ) 頁： 023701-1 - 023701-4 2024年2月

Low temperature phase transitions inside the CDW phase in the kagome metals AV3Sb5 (A=Cs, Rb, K): Significance of mixed-type Fermi surface electron correlations 査読有り

Jianxin Huang, Rian Tazai, Youichi Yamakawa, Seiichiro Onari, and Hiroshi Kontani

Physical Review B 109 巻 ( 4 ) 頁： L041110-1 - L041110-6 2024年1月

Drastic magnetic-field-induced chiral current order and emergent current-bond-field interplay in kagome metals 査読有り国際誌 Open Access

Tazai, R; Yamakawa, Y; Kontani, H

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 121 巻 ( 3 ) 頁： e2303476121-1 - e2303476121-10 2024年1月

Superconductivity in Ternary Scandium Telluride Sc6MTe2 with 3d, 4d, and 5d Transition Metals 査読有り

Shinoda, Y; Okamoto, Y; Yamakawa, Y; Matsumoto, H; Hirai, D; Takenaka, K

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 92 巻 ( 10 ) 頁： 103701-1 - 103701-5 2023年8月

Rigorous formalism for unconventional symmetry breaking in Fermi liquid theory and its application to nematicity in FeSe

Tazai Rina, Matsubara Shun, Yamakawa Youichi, Onari Seiichiro, Kontani Hiroshi

PHYSICAL REVIEW B 107 巻 ( 3 ) 2023年1月

Correlation-driven electronic nematicity in the Dirac semimetal BaNiS2 査読有り

Butler Christopher John, Kohsaka Yuhki, Yamakawa Youichi, Bahramy Mohammad Saeed, Onari Seiichiro, Kontani Hiroshi, Hanaguri Tetsuo, Shamoto Shinichi

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 119 巻 ( 49 ) 頁： e2212730119-1 - e2212730119-8 2022年12月

d- and p-wave Quantum Liquid Crystal Orders in Cuprate Superconductors, Kappa-(BEDT-TTF)(2)X, and Coupled Chain Hubbard Models: Functional-renormalization-group Analysis

Tazai Rina, Yamakawa Youichi, Tsuchiizu Masahisa, Kontani Hiroshi

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 90 巻 ( 11 ) 2021年11月

Unconventional orbital charge density wave mechanism in the transition metal dichalcogenide 1T-TaS2 査読有り

Hirata Toru, Yamakawa Youichi, Onari Seiichiro, Kontani Hiroshi

PHYSICAL REVIEW RESEARCH 3 巻 ( 3 ) 頁： L032053-1 - L032053-6 2021年8月

Pressure-induced reconstitution of Fermi surfaces and spin fluctuations in S-substituted FeSe

Kuwayama T., Matsuura K., Gouchi J., Yamakawa Y., Mizukami Y., Kasahara S., Matsuda Y., Shibauchi T., Kontani H., Uwatoko Y., Fujiwara N.

SCIENTIFIC REPORTS 11 巻 ( 1 ) 2021年8月

Unconventional density waves and superconductivities in Fe-based superconductors and other strongly correlated electron systems 招待有り査読有り

Kontani Hiroshi, Tazai Rina, Yamakawa Youichi, Onari Seiichiro

ADVANCES IN PHYSICS 70 巻 ( 3 ) 頁： 355 - 443 2021年7月

Development of Spin Fluctuations under the Presence of d-wave Bond Order in Cuprate Superconductors 査読有り

Ando Satoshi, Yamakawa Youichi, Onari Seiichiro, Kontani Hiroshi

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 90 巻 ( 6 ) 頁： 063704-1 - 063704-5 2021年6月

Superconductivity in Nb2Pd3Te5 and Chemically-Doped Ta2Pd3Te5 査読有り

Higashihara Naoya, Okamoto Yoshihiko, Yoshikawa Yuma, Yamakawa Youichi, Takatsu Hiroshi, Kageyama Hiroshi, Takenaka Koshi

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 90 巻 ( 6 ) 頁： 063705-1 - 063705-4 2021年6月

Prediction of pseudogap formation due to d-wave bond-order in organic superconductor kappa-(BEDT-TTF)(2)X 査読有り

Tazai Rina, Yamakawa Youichi, Tsuchiizu Masahisa, Kontani Hiroshi

PHYSICAL REVIEW RESEARCH 3 巻 ( 2 ) 頁： L022014-1 - L022014-6 2021年5月

Emergence of charge loop current in the geometrically frustrated Hubbard model: A functional renormalization group study 査読有り

Tazai Rina, Yamakawa Youichi, Kontani Hiroshi

PHYSICAL REVIEW B 103 巻 ( 16 ) 2021年4月

High-mobility carriers induced by chemical doping in the candidate nodal-line semimetal CaAgP

Okamoto Yoshihiko, Saigusa Kazushige, Wada Taichi, Yamakawa Youichi, Yamakage Ai, Sasagawa Takao, Katayama Naoyuki, Takatsu Hiroshi, Kageyama Hiroshi, Takenaka Koshi

PHYSICAL REVIEW B 102 巻 ( 11 ) 2020年9月

Doping effects on electronic states in electron-doped FeSe: Impact of self-energy and vertex corrections

Yamakawa Youichi, Onari Seiichiro, Kontani Hiroshi

PHYSICAL REVIEW B 102 巻 ( 8 ) 2020年8月

Superconductivity in PtSbS with a Noncentrosymmetric Cubic Crystal Structure

Mizutani Ryosuke, Okamoto Yoshihiko, Nagaso Hayate, Yamakawa Youichi, Takatsu Hiroshi, Kageyama Hiroshi, Kittaka Shunichiro, Kono Yohei, Sakakibara Toshiro, Takenaka Koshi

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 88 巻 ( 9 ) 2019年9月

Pressure-induced quantum critical point in the heavily hydrogen-doped iron-based superconductor LaFeAsO

Takeuchi Masayoshi, Fujiwara Naoki, Kuwayama Takanori, Nakagawa Satoshi, Iimura Soshi, Matsuishi Satoru, Yamakawa Youichi, Kontani Hiroshi, Hosono Hideo

PHYSICAL REVIEW B 99 巻 ( 17 ) 2019年5月

Self-energy driven resonancelike inelastic neutron spectrum in the s(++)-wave state in Fe-based superconductors

Takeuchi Lisa, Yamakawa Youichi, Kontani Hiroshi

PHYSICAL REVIEW B 98 巻 ( 16 ) 2018年10月

Pairing mechanism for nodal s-wave superconductivity in BaFe2(As, P)(2): Analysis beyond Migdal-Eliashberg formalism

Nakaoka Hironori, Yamakawa Youichi, Kontani Hiroshi

PHYSICAL REVIEW B 98 巻 ( 12 ) 2018年9月

Edge-induced Strongly Correlated Electronic States in Two-dimensional Hubbard Model: Enhancement of Magnetic Correlations and Self-energy Effects

Matsubara Shun, Yamakawa Youichi, Kontani Hiroshi

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 87 巻 ( 7 ) 2018年7月

Large thermoelectric power factor in one-dimensional telluride Nb4SiTe4 and substituted compounds

Okamoto Yoshihiko, Wada Taichi, Yamakawa Youichi, Inohara Takumi, Takenaka Koshi

APPLIED PHYSICS LETTERS 112 巻 ( 17 ) 2018年4月

Multistage electronic nematic transitions in cuprate superconductors: A functional-renormalization-group analysis

Tsuchiizu Masahisa, Kawaguchi Kouki, Yamakawa Youichi, Kontani Hiroshi

PHYSICAL REVIEW B 97 巻 ( 16 ) 2018年4月

Abrupt change of the superconducting gap structure at the nematic critical point in FeSe1-xSx 査読有り

Sato Yuki, Kasahara Shigeru, Taniguchi Tomoya, Xing Xiangzhuo, Kasahara Yuichi, Tokiwa Yoshifumi, Yamakawa Youichi, Kontani Hiroshi, Shibauchi Takasada, Matsuda Yuji

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115 巻 ( 6 ) 頁： 1227 - 1231 2018年2月

Observation of Dirac-like energy band and ring-torus Fermi surface associated with the nodal line in topological insulator CaAgAs 査読有り

Takane Daichi, Nakayama Kosuke, Souma Seigo, Wada Taichi, Okamoto Yoshihiko, Takenaka Koshi, Yamakawa Youichi, Yamakage Ai, Mitsuhashi Taichi, Horiba Koji, Kumigashira Hiroshi, Takahashi Takashi, Sato Takafumi

NPJ QUANTUM MATERIALS 3 巻 2018年1月

Nematicity, magnetism, and superconductivity in FeSe under pressure: Unified explanation based on the self-consistent vertex correction theory 査読有り

Yamakawa Youichi, Kontani Hiroshi

PHYSICAL REVIEW B 96 巻 ( 14 ) 2017年10月

Superconductivity without a hole pocket in electron-doped FeSe: Analysis beyond the Migdal-Eliashberg formalism 査読有り

Yamakawa Youichi, Kontani Hiroshi

PHYSICAL REVIEW B 96 巻 ( 4 ) 2017年7月

Plain s-Wave Superconductivity near Magnetic Criticality: Enhancement of Attractive Electron-Boson Coupling Vertex Corrections 査読有り

Tazai Rina, Yamakawa Youichi, Tsuchiizu Masahisa, Kontani Hiroshi

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 86 巻 ( 7 ) 2017年7月

Crossing-line-node semimetals: General theory and application to rare-earth trihydrides 査読有り

Kobayashi Shingo, Yamakawa Youichi, Yamakage Ai, Inohara Takumi, Okamoto Yoshihiko, Tanaka Yukio

PHYSICAL REVIEW B 95 巻 ( 24 ) 2017年6月

Competing Unconventional Charge-Density-Wave States in Cuprate Superconductors: Spin-Fluctuation-Driven Mechanism 査読有り

Kawaguchi Kouki, Yamakawa Youichi, Tsuchiizu Masahisa, Kontani Hiroshi

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 86 巻 ( 6 ) 2017年6月

Large thermoelectric power factor at low temperatures in one-dimensional telluride Ta4SiTe4 査読有り

Inohara Takumi, Okamoto Yoshihiko, Yamakawa Youichi, Yamakage Ai, Takenaka Koshi

APPLIED PHYSICS LETTERS 110 巻 ( 18 ) 2017年5月

Unusual nodal behaviors of the superconducting gap in the iron-based superconductor Ba(Fe0.65Ru0.35)(2)As-2: Effects of spin-orbit coupling 査読有り

Liu L., Okazaki K., Yoshida T., Suzuki H., Horio M., Ambolode L. C. C. II, Xu J., Ideta S., Hashimoto M., Lu D. H., Shen Z. -X., Ota Y., Shin S., Nakajima M., Ishida S., Kihou K., Lee C. H., Iyo A., Eisaki H., Mikami T., Kakeshita T., Yamakawa Y., Kontani H., Uchida S., Fujimori A.

PHYSICAL REVIEW B 95 巻 ( 10 ) 頁： 104504 2017年3月

Low Carrier Density Metal Realized in Candidate Line-Node Dirac Semimetals CaAgP and CaAgAs 査読有り

Okamoto Yoshihiko, Inohara Takumi, Yamakage Ai, Yamakawa Youichi, Takenaka Koshi

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 85 巻 ( 12 ) 2016年12月

Functional renormalization group study of orbital fluctuation mediated superconductivity: Impact of the electron-boson coupling vertex corrections 査読有り

Tazai Rina, Yamakawa Youichi, Tsuchiizu Masahisa, Kontani Hiroshi

PHYSICAL REVIEW B 94 巻 ( 11 ) 2016年9月

Synthesis and Superconducting Properties of a Hexagonal Phosphide ScRhP 査読有り

Inohara Takumi, Okamoto Yoshihiko, Yamakawa Youichi, Takenaka Koshi

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 85 巻 ( 9 ) 2016年9月

Theoretical prediction of nematic orbital-ordered state in the Ti oxypnictide superconductor BaTi2(As,Sb)(2)O 査読有り

Nakaoka Hironori, Yamakawa Youichi, Kontani Hiroshi

PHYSICAL REVIEW B 93 巻 ( 24 ) 2016年6月

p-orbital density wave with d symmetry in high-T-c cuprate superconductors predicted by renormalization-group plus constrained RPA theory 査読有り

Tsuchiizu Masahisa, Yamakawa Youichi, Kontani Hiroshi

PHYSICAL REVIEW B 93 巻 ( 15 ) 2016年4月

Superconductivity in the Hexagonal Ternary Phosphide ScIrP 査読有り

Okamoto Yoshihiko, Inohara Takumi, Yamakawa Youichi, Yamakage Ai, Takenaka Koshi

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 85 巻 ( 1 ) 2016年1月

Line-Node Dirac Semimetal and Topological Insulating Phase in Noncentrosymmetric Pnictides CaAgX (X = P, As) 査読有り

Yamakage Ai, Yamakawa Youichi, Tanaka Yukio, Okamoto Yoshihiko

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 85 巻 ( 1 ) 2016年1月

Superconductivity pairing mechanism from cobalt impurity doping in FeSe: Spin (s±) or orbital (s++) fluctuation 査読有り

T. Urata, Y. Tanabe, K. K. Huynh, Y. Yamakawa, H. Kontani, K. Tanigaki

Physical Review B 93 巻 ( 1 ) 頁： 014507 2016年1月

Momentum-dependent sign inversion of orbital order in superconducting FeSe 査読有り

Y. Suzuki, T. Shimojima, T. Sonobe, A. Nakamura, M. Sakano, H. Tsuji, J. Omachi, K. Yoshioka, M. Kuwata-Gonokami, T. Watashige, R. Kobayashi, S. Kasahara, T. Shibauchi, Y. Matsuda, Y. Yamakawa, H. Kontani, K. Ishizaka

Physical Review B 92 巻 ( 20 ) 頁： 205117 2015年11月

Revisiting orbital-fluctuation-mediated superconductivity in LiFeAs: Nontrivial spin-orbit interaction effects on the band structure and superconducting gap function 査読有り

Saito Tetsuro, Yamakawa Youichi, Onari Seiichiro, Kontani Hiroshi

PHYSICAL REVIEW B 92 巻 ( 13 ) 2015年10月

Quasiparticle interference in Fe-based superconductors based on a five-orbital tight-binding model 査読有り

Yamakawa Youichi, Kontani Hiroshi

PHYSICAL REVIEW B 92 巻 ( 4 ) 2015年7月

Spin-Fluctuation-Driven Nematic Charge-Density Wave in Cuprate Superconductors: Impact of Aslamazov-Larkin Vertex Corrections 査読有り

Yamakawa Youichi, Kontani Hiroshi

PHYSICAL REVIEW LETTERS 114 巻 ( 25 ) 頁： 257001-1 - 257001-6 2015年6月

Spin-triplet superconductivity in Sr2RuO4 due to orbital and spin fluctuations: Analyses by two-dimensional renormalization group theory and self-consistent vertex-correction method 査読有り

Tsuchiizu Masahisa, Yamakawa Youichi, Onari Seiichiro, Ohno Yusuke, Kontani Hiroshi

PHYSICAL REVIEW B 91 巻 ( 15 ) 2015年4月

Quantum critical behavior in heavily doped LaFeAsO1-xHx pnictide superconductors analyzed using nuclear magnetic resonance 査読有り

R. Sakurai, N. Fujiwara, N. Kawaguchi, Y. Yamakawa, H. Kontani, S. Iimura, S. Matsuishi, H. Hosono

Physical Review B 91 巻 ( 6 ) 頁： 064509 2015年2月

Linear Response Theory for Shear Modulus C-66 and Raman Quadrupole Susceptibility: Evidence for Nematic Orbital Fluctuations in Fe-based Superconductors 査読有り

Kontani Hiroshi, Yamakawa Youichi

PHYSICAL REVIEW LETTERS 113 巻 ( 4 ) 2014年7月

Reproduction of experimental gap structure in LiFeAs based on orbital-spin fluctuation theory: s(++)-wave, s(+/-)-wave, and hole-s(+/-)-wave states 査読有り

Saito Tetsuro, Onari Seiichiro, Yamakawa Youichi, Kontani Hiroshi, Borisenko Sergey V., Zabolotnyy Volodymyr B.

PHYSICAL REVIEW B 90 巻 ( 3 ) 2014年7月

High-T-c Superconductivity near the Anion Height Instability in Fe-Based Superconductors: Analysis of LaFeAsO1-xHx 査読有り

Onari Seiichiro, Yamakawa Youichi, Kontani Hiroshi

PHYSICAL REVIEW LETTERS 112 巻 ( 18 ) 2014年5月

Zigzag Chain Structure Transition and Orbital Fluctuations in Ni-Based Superconductors 査読有り

Yamakawa Youichi, Onari Seiichiro, Kontani Hiroshi

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 82 巻 ( 9 ) 2013年9月

Detection of Antiferromagnetic Ordering in Heavily Doped LaFeAsO1-xHx Pnictide Superconductors Using Nuclear-Magnetic-Resonance Techniques 査読有り

N. Fujiwara, S. Tsutsumi, S. Iimura, S. Matsuishi, H. Hosono, Y. Yamakawa, H. Kontani

Physical Review Letters 111 巻 ( 9 ) 頁： 097002 2013年8月

Phase diagram and superconducting states in LaFeAsO1-xHx based on the multiorbital extended Hubbard model 査読有り

Y. Yamakawa, S. Onari, H. Kontani, N. Fujiwara, S. Iimura, H. Hosono

Physical Review B 88 巻 ( 4 ) 頁： 041106(R) 2013年7月

Effect of realistic finite-size impurities on T-c in Fe-based superconductors based on the five-orbital tight-binding model 査読有り

Yamakawa Youichi, Onari Seiichiro, Kontani Hiroshi

PHYSICAL REVIEW B 87 巻 ( 19 ) 2013年5月

Effect of inelastic scattering on the nuclear magnetic relaxation rate 1/T1T in iron-based superconductors 査読有り

Yamakawa Youichi, Onari Seiichiro, Kontani Hiroshi

SUPERCONDUCTOR SCIENCE & TECHNOLOGY 25 巻 ( 8 ) 2012年8月

Impurity-induced electronic nematic state and C-2-symmetric nanostructures in iron pnictide superconductors 査読有り

Inoue Yoshio, Yamakawa Youichi, Kontani Hiroshi

PHYSICAL REVIEW B 85 巻 ( 22 ) 2012年6月

Orbital fluctuation theory in iron-based superconductors: s(++)-wave superconductivity, structure transition, and impurity-induced nematic order 査読有り

Kontani Hiroshi, Inoue Yoshio, Saito Tetsuro, Yamakawa Youichi, Onari Seiichiro

SOLID STATE COMMUNICATIONS 152 巻 ( 8 ) 頁： 718-727 2012年4月

Structural transition, ferro-orbital order and its fluctuation-mediated s(++)-wave superconductivity in iron pnictides 査読有り

Ono Yoshiaki, Yanagi Yuki, Adachi Naoko, Yamakawa Youichi

SOLID STATE COMMUNICATIONS 152 巻 ( 8 ) 頁： 701-710 2012年4月

Orbital Order, Structural Transition, and Superconductivity in Iron Pnictides 査読有り

Yanagi Yuki, Yamakawa Youichi, Adachi Naoko, Ono Yoshiaki

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 79 巻 ( 12 ) 2010年12月

Cooperative effects of Coulomb and electron-phonon interactions in the two-dimensional 16-band d-p model for iron-based superconductors 査読有り

Yanagi Yuki, Yamakawa Youichi, Adachi Naoko, Ono Yoshiaki

PHYSICAL REVIEW B 82 巻 ( 6 ) 2010年8月

Two types of s-wave pairing due to magnetic and orbital fluctuations in the two-dimensional 16-band d-p model for iron-based superconductors 査読有り

Yanagi Yuki, Yamakawa Youichi, Ono Yoshiaki

PHYSICAL REVIEW B 81 巻 ( 5 ) 2010年2月

Antiferromagnetic, Charge and Orbital Order in Na0.5CoO2 Based on the Two Dimensional 11 Bands d-p Model 査読有り

Yamakawa Youichi, Watanabe Naohiro, Ono Yoshiaki

INTERNATIONAL CONFERENCE ON MAGNETISM (ICM 2009) 200 巻 2010年

Effect of the spin-orbit interaction and the electron phonon coupling on the electronic state in a silicon vacancy 査読有り

Yamada Takemi, Yamakawa Youichi, Ono Yoshiaki

INTERNATIONAL CONFERENCE ON MAGNETISM (ICM 2009) 200 巻 2010年

Structural Transition of Li2RuO3 Induced by Molecular-Orbit Formation 査読有り

Miura Yoko, Sato Masatoshi, Yamakawa Youichi, Habaguchi Tatsuro, Ono Yoshiaki

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 78 巻 ( 9 ) 2009年9月

Quadrupole Susceptibility and Elastic Softening due to a Vacancy in Silicon Crystal 査読有り

Yamada Takemi, Yamakawa Youichi, Ono Yoshiaki

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 78 巻 ( 5 ) 2009年5月

Cluster Model Calculations for Charge States of a Silicon Vacancy 査読有り

Yamakawa Youichi, Ono Yoshiaki

25TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT25), PART 4 150 巻 2009年

Magnetism and Superconductivity in the Two-Dimensional 16-Band d-p Model for Iron-Based Superconductors 査読有り

Yanagi Yuki, Yamakawa Youichi, Ono Yoshiaki

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 77 巻 ( 12 ) 2008年12月

Antiferromagnetic, charge and orbital ordered states of Na0.5CoO2 based on the two-dimensional triangular lattice d-p model 査読有り

Yamakawa Youichi, Ono Yoshiaki

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS 69 巻 ( 12 ) 頁： 3349-3351 2008年12月

Electronic states and pairing symmetry in the two-dimensional 16 band d-p model for iron-based superconductor 査読有り

Yanagi Yuki, Yamakawa Youichi, Ono Yoshiaki

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 77 巻頁： 149-150 2008年11月

Effects of Electron Correlation and Electron-phonon Coupling on the quantum state of a Silicon Vacancy 査読有り

Yamakawa Youichi, Mitsumoto Keisuke, Ono Yoshiaki

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 77 巻頁： 266-268 2008年1月

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