Faculty Profiles - ONARI Seiichiro

Papers - ONARI Seiichiro

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Microscopic origin of period-four stripe charge density wave in the kagome metal CsV3Sb5 Reviewed Open Access

Yuma Murata, Rina Tazai, Youichi Yamakawa, Seiichiro Onari, and Hiroshi Kontani

Physical Review B Vol. 113 page： 155108_1 - 155108_12 2026.4

Paramagnon-Interference Mechanism for Three-Dimensional Bond Order in Kagome Metals AV3Sb5 (A=Cs, Rb, K): Analysis by the Density-Wave Equation Reviewed

Seiichiro Onari, Rina Tazai, Youichi Yamakawa, Hiroshi Kontani

Journal of the Physical Society of Japan Vol. 95 page： 044707_1 - 044707_9 2026.3

Unified mechanism of charge-density-wave and high-Tc superconductivity protected from oxygen vacancies in bilayer nickelates Reviewed Open Access

Daisuke Inoue, Youichi Yamakawa, Seiichiro Onari, Hiroshi Kontani

Communications Physics Vol. 9 page： 115_1 - 115_14 2026.2

Non-Fermi-Liquid Transport Phenomena in Infinite-Layer Nickelates Reviewed

Shinichi Hiragami and Seiichiro Onari

Journal of the Physical Society of Japan Vol. 94 page： 124706_1 - 124706_5 2025.11

Origin of switchable quasiparticle-interference chirality in loop-current phase of kagome metals measured by scanning-tunneling-microscopy Reviewed

Seigo Nakazawa, Rina Tazai, Youichi Yamakawa, Seiichiro Onari, and Hiroshi Kontani

Nature Communications Vol. 18 page： 9545_1 - 9545_11 2025.10

Giant impurity effects on charge loop current order states in kagome metals Reviewed

Seigo Nakazawa, Rina Tazai , Youichi Yamakawa, Seiichiro Onari, and Hiroshi Kontani

Physical Review B Vol. 111 page： 075161_1 - 075161_10 2025.2

Robust T -linear resistivity due to SU(4) valley and spin fluctuation mechanism in magic-angle twisted bilayer graphene Reviewed

Inoue D., Onari S., Kontani H.

Physical Review B Vol. 109 ( 20 ) 2024.5

Language：English Publisher：Physical Review B

In the magic angle twisted bilayer graphene (MATBG), non-Fermi liquidlike transport phenomena are universally observed. To understand their origin, we perform the self-consistent analysis of the self-energy due to SU(4) valley + spin fluctuations induced by the electron-electron correlation. In the SU(4) fluctuation mechanism, the 15 channels of fluctuations contribute additively to the self-energy. Therefore, the SU(4) fluctuation mechanism gives much higher electrical resistance than the spin fluctuation mechanism. By the same reason, SU(4) fluctuations of intermediate strength provide T-linear resistivity down to ∼1K. Interestingly, the T-linear resistivity is robustly realized for a wide range of electron filling, even away from the van Hove filling. This study provides a strong evidence for the importance of electron-electron correlation in MATBG.

DOI： 10.1103/PhysRevB.109.205102

Scopus

Real-Space Loop Current Pattern in Time-Reversal-Symmetry Breaking Phasein Kagome Metals Reviewed Open Access

Koki Shimura, Rina Tazai, Youichi Yamakawa, Seiichiro Onari, and Hiroshi Kontani

Journal of the Physical Society of Japan Vol. 93 page： 033704_1 - 033704_5 2024.3

Low temperature phase transitions inside the CDW phase in the kagome metals A V3Sb5 (A=Cs, Rb, K): Significance of mixed-type Fermi surface electron correlations Reviewed

J. Huang, R. Tazai, Y. Yamakawa, S. Onari, H. Kontani

Physical Review B Vol. 109 ( 4 ) page： L041110_1 - L041110_6 2024.1

Three-dimensional bond-order instability in infinite-layer nickelates due to nonlocal quantum interference Reviewed Open Access

Seiichiro Onari and Hiroshi Kontani

Physical Review B Vol. 108 page： L241119_1 - L241119_6 2023.12

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

Vol. 107 ( 3 ) page： 035137_1 - 035137_16 2023.1

Unconventional density waves and superconductivities in Fe-based superconductors and other strongly correlated electron systems Invited Reviewed Open Access

Hiroshi Kontani, Rina Tazai, Youichi Yamakawa, and Seiichiro Onari

Advances in Physics Vol. 107 ( 3 ) page： 355 - 443 2023.1

Correlation-driven electronic nematicity in the Dirac semimetal BaNiS2 Reviewed Open Access

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

Proceedings of the National Academy of Sciences of the United States of America Vol. 119 page： e2212730119_1 - e2212730119_8 2022.12

魔法角ツイスト2層グラフェンにおけるネマティック秩序―SU(4)揺らぎ間干渉機構― Invited Reviewed

大成誠一郎、紺谷浩

固体物理 Vol. 57 ( 10 ) page： 571 - 580 2022.10

Diverse Exotic Orders and Fermiology in Fe-Based Superconductors: A Unified Mechanism for Bg/Bg Nematicity in FeSe/(Cs,Rb)Fe2As2 and Smectic Order in BaFe2As2 Invited Reviewed Open Access

Frontiers in Physics Vol. 10 page： 915619_1 - 915619_15 2022.7

Mechanism of exotic density-wave and beyond-Migdal unconventional superconductivity in kagome metal AV3Sb5 (A = K, Rb, Cs). Reviewed Open Access

Tazai R, Yamakawa Y, Onari S, Kontani H

Science advances Vol. 8 ( 13 ) page： eabl4108 2022.4

Language：English Publishing type：Research paper (scientific journal) Publisher：Science advances

Exotic quantum phase transitions in metals, such as the electronic nematic state, have been discovered one after another and found to be universal now. The emergence of unconventional density-wave (DW) order in frustrated kagome metal AV3Sb5 and its interplay with exotic superconductivity attract increasing attention. We find that the DW in kagome metal is the bond order, because the sizable intersite attraction is caused by the quantum interference among paramagnons. This mechanism is important in kagome metals because the geometrical frustration prohibits the freezing of paramagnons. In addition, we uncover that moderate bond-order fluctuations mediate sizable pairing glue, and this mechanism gives rise to both singlet s-wave and triplet p-wave superconductivity. Furthermore, characteristic pressure-induced phase transitions in CsV3Cb5 are naturally understood by the present theory. Thus, both the exotic density wave and the superconductivity in geometrically frustrated kagome metals are explained by the quantum interference mechanism.

DOI： 10.1126/sciadv.abl4108

Scopus

PubMed

金属電子系における新規な自発的対称性の破れ Reviewed Open Access

田財里奈、大成誠一郎、紺谷浩

日本物理学会誌 Vol. 77 ( 3 ) page： 145 - 154 2022.3

SU(4) Valley+Spin Fluctuation Interference Mechanism for Nematic Order in Magic-Angle Twisted Bilayer Graphene: The Impact of Vertex Corrections Reviewed Open Access

Physical review letters Vol. 128 ( 6 ) page： 066401 2022.2

Discovery of mesoscopic nematicity wave in iron-based superconductors Reviewed International coauthorship Open Access

Shimojima T., Motoyui Y., Taniuchi T., Bareille C., Onari S., Kontani H., Nakajima M., Kasahara S., Shibauchi T., Matsuda Y., Shin S.

Science Vol. 373 ( 6559 ) page： 1122 - 1125 2021.9

Unconventional orbital charge density wave mechanism in the transition metal dichalcogenide 1T-TaS₂ Reviewed Open Access

Toru Hirata, Youichi Yamakawa, Seiichiro Onari, Hiroshi Kontani

Physical Review Research Vol. 3 page： L032053_1 - L032053_6 2021.8

Development of Spin Fluctuations under the Presence of d-wave Bond Order in Cuprate Superconductors Reviewed Open Access

Ando Satoshi, Yamakawa Youichi, Onari Seiichiro, Kontani Hiroshi

Journal of the Physical Society of Japan Vol. 90 ( 6 ) page： 63704 - 63704 2021.6

Electronic and crystal structures ofLnFeAsO1-xHx(Ln= La, Sm) studied by x-ray absorption spectroscopy, x-ray emission spectroscopy, and x-ray diffraction:II pressure dependence.

Yamamoto Y, Yamaoka H, Kawai T, Yoshida M, Yamaura JI, Ishii K, Onari S, Uozumi T, Hariki A, Taguchi M, Kobayashi K, Lin JF, Hiraoka N, Ishii H, Tsuei KD, Okanishi H, Iimura S, Matsuishi S, Hosono H, Mizuki J

Journal of physics. Condensed matter : an Institute of Physics journal Vol. 33 page： 255603_1 - 255603_10 2021.4

Yamamoto Y, Yamaoka H, Uozumi T, Hariki A, Onari S, Yamaura JI, Ishii K, Kawai T, Yoshida M, Taguchi M, Kobayashi K, Lin JF, Hiraoka N, Ishii H, Tsuei KD, Okanishi H, Iimura S, Matsuishi S, Hosono H, Mizuki J

Journal of physics. Condensed matter : an Institute of Physics journal Vol. 33 page： 255602_1 - 255602_11 2021.4

Odd-parity spin-loop-current order mediated by transverse spin fluctuations in cuprates and related electron systems Reviewed Open Access

Hiroshi Kontani, Youichi Yamakawa, Rina Tazai, and Seiichiro Onari

Physical Review Research Vol. 3 page： 013127_1 - 013127_12 2021.2

Spin-fluctuation-driven B1g and B2g Bond Order and Induced In-plane Anisotropy in Magnetic Susceptibility in Cuprate Superconductors: Impact of Hot-/Cold-spot Structure on Bond-order Symmetry Reviewed

Kawaguchi Kouki, Onari Seiichiro, Kontani Hiroshi

Journal of the Physical Society of Japan Vol. 89 ( 12 ) page： 124704_1-124704_9 2020.12

Hidden antiferronematic order in Fe-based superconductor BaFe2As2 and NaFeAs above Ts Reviewed Open Access

Onari Seiichiro, Kontani Hiroshi

PHYSICAL REVIEW RESEARCH Vol. 2 ( 4 ) 2020.10

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

Yamakawa Youichi, Onari Seiichiro, Kontani Hiroshi

PHYSICAL REVIEW B Vol. 102 ( 8 ) 2020.8

Superconductivity in 5d transition metal Laves phase SrIr2 Reviewed

Horie R., Horigane K., Nishiyama S., Akimitsu M., Kobayashi K., Onari S., Kambe T., Kubozono Y., Akimitsu J.

JOURNAL OF PHYSICS-CONDENSED MATTER Vol. 32 ( 17 ) 2020.4

Origin of diverse nematic orders in Fe-based superconductors: 45 degrees rotated nematicity in AFe₂As₂ (A=Cs, Rb) Reviewed Open Access

Onari Seiichiro, Kontani Hiroshi

PHYSICAL REVIEW B Vol. 100 ( 2 ) 2019.7

Study of the Pressure-Induced Second Superconducting Phase of (NH3)(y)Cs0.4FeSe with Double-Dome Superconductivity

Yamamoto Yoshiya, Yamaoka Hitoshi, Onari Seiichiro, Yoshida Masahiro, Hirao Naohisa, Kawaguchi Saori, Oishi Yasuo, Miao Xiao, Kubozono Yoshihiro, Lin Jung-Fu, Hiraoka Nozomu, Ishii Hirofumi, Liao Yen-Fa, Tsuei Ku-Ding, Mizuki Jun'ichiro

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN Vol. 88 ( 7 ) 2019.7

Paramagnetic Pair-Breaking in Spin-Triplet Superconductors with Spin-Orbit Coupling: Application to Sr₂RuO₄ Reviewed Open Access

Oda Koushi, Tanaka Kenta K., Onari Seiichiro, Ichioka Masanori

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN Vol. 88 ( 6 ) page： 064707 2019.6

Local NMR relaxation rates T1-1 and T2-1 depending on the d-vector symmetry in the vortex state of chiral and helical p-wave superconductors Reviewed

Kenta K. Tanaka, Masanori Ichioka, Seiichiro Onari

Physical Review B Vol. 97 page： 134507 2018.4

Orbital Order in Two-Orbital Hubbard Model Reviewed Open Access

Honkawa Kojiro, Onari Seiichiro

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN Vol. 87 ( 3 ) 2018.3

Theoretical analysis for spin-polarized local density of states in the vortex state of helical p-wave superconductors Open Access

Kenta K. Tanaka, Masanori Ichioka, Seiichiro Onari

28TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT28) Vol. 969 2018

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

Based on the quasi-classical Eilenberger theory, we calculate the site-dependence of order-parameter and spin-polarized local density of states (LDOS) in the vortex lattice state of helical p-wave superconductors. The spin-polarized LDOS is induced around the vortex core by the vorticity coupling to the chirality of up-spin pair or down-spin pair. In order to distinguish the d-vector symmetry, we investigate the magnetic field effect on the spatial structure of the spin-polarized LDOS.

DOI： 10.1088/1742-6596/969/1/012043

Open Access

Web of Science

In-plane anisotropy of transport coefficients in electronic nematic states: Universal origin of nematicity in Fe-based superconductors Open Access

Onari Seiichiro, Kontani Hiroshi

PHYSICAL REVIEW B Vol. 96 ( 9 ) 2017.9

Pair breaking of multigap superconductivity under parallel magnetic fields in the electric-field-induced surface metallic state Reviewed Open Access

Nabeta Masahiro, Tanaka Kenta K., Onari Seiichiro, Ichioka Masanori

PHYSICAL REVIEW B Vol. 96 ( 9 ) 2017.9

Electronic structures and spin states of BaFe2As2 and SrFe2As2 probed by x-ray emission spectroscopy at Fe and As K-absorption edges Reviewed Open Access

Yamaoka Hitoshi, Yamamoto Yoshiya, Lin Jung-Fu, Wu Junjie J., Wang Xiancheng, Jin Changqing, Yoshida Masahiro, Onari Seiichiro, Ishida Shigeyuki, Tsuchiya Yoshinori, Takeshita Nao, Hiraoka Nozomu, Ishii Hirofumi, Tsuei Ku-Ding, Chow Paul, Xiao Yuming, Mizuki Jun'ichiro

PHYSICAL REVIEW B Vol. 96 ( 8 ) 2017.8

Spin-polarized local density of states in the vortex state of helical p-wave superconductors Reviewed Open Access

Tanaka Kenta K., Ichioka Masanori, Onari Seiichiro

PHYSICAL REVIEW B Vol. 95 ( 13 ) 2017.4

Paramagnetic and diamagnetic pair-breaking effect in electric-field-induced surface superconductivity under parallel magnetic fields Reviewed Open Access

Masanori Ichioka, Masahiro Nabeta, Kenta K. Tanaka, and Seiichiro Onari

Journal of Physics: Conference Series Vol. 871 page： 012001_1-012001_6 2017

Spin-polarized local density of states around vortex in helical p-wave superconductors Reviewed Open Access

Kenta K. Tanaka, Masanori Ichioka, and Seiichiro Onari

Journal of Physics: Conference Series Vol. 871 page： 012024_1-012024_7 2017

Iron arsenides with three-dimensional FeAs layer networks: Can(n+1)/2(Fe1-xPtx)((2+3n))Ptn(n-1)/2 As(n+1)(n+2)/2 (n=2, 3) Reviewed Open Access

Katayama Naoyuki, Onari Seiichiro, Matsubayashi Kazuyuki, Uwatoko Yoshiya, Sawa Hiroshi

SCIENTIFIC REPORTS Vol. 6 2016.12

Pair-breaking effects by parallel magnetic field in electric-field-induced surface superconductivity Reviewed

Nabeta Masahiro, Tanaka Kenta K., Onari Seiichiro, Ichioka Masanori

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS Vol. 530 page： 8-10 2016.11

Effects of vorticity and impurity on NMR relaxation rate in chiral p-wave superconductors Reviewed

Tanaka Kenta K., Ichioka Masanori, Onari Seiichiro

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS Vol. 530 page： 62-64 2016.11

Nematicity and Magnetism in FeSe and Other Families of Fe-Based Superconductors Reviewed Open Access

Yamakawa Youichi, Onari Seiichiro, Kontani Hiroshi

PHYSICAL REVIEW X Vol. 6 ( 2 ) 2016.6

Sign-Reversing Orbital Polarization in the Nematic Phase of FeSe due to the C-2 Symmetry Breaking in the Self-Energy Reviewed Open Access

Onari Seiichiro, Yamakawa Youichi, Kontani Hiroshi

PHYSICAL REVIEW LETTERS Vol. 116 ( 22 ) 2016.6

Site-selective NMR for odd-frequency Cooper pairs around vortex in chiral p-wave superconductors Reviewed Open Access

Tanaka Kenta K., Ichioka Masanori, Onari Seiichiro

PHYSICAL REVIEW B Vol. 93 ( 9 ) 2016.3

Revisiting orbital-fluctuation-mediated superconductivity in LiFeAs: Nontrivial spin-orbit interaction effects on the band structure and superconducting gap function Reviewed Open Access

Saito Tetsuro, Yamakawa Youichi, Onari Seiichiro, Kontani Hiroshi

PHYSICAL REVIEW B Vol. 92 ( 13 ) 2015.10

Superconductivity in MgPtSi: An orthorhombic variant of MgB2 Reviewed Open Access

Kudo Kazutaka, Fujimura Kazunori, Onari Seiichiro, Ota Hiromi, Nohara Minoru

PHYSICAL REVIEW B Vol. 91 ( 17 ) 2015.5

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

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

PHYSICAL REVIEW B Vol. 91 ( 15 ) 2015.4

Eilenberger theory for nuclear magnetic relaxation rate in superconducting vortex lattice state Reviewed

Tanaka Kenta K., Ichioka Masanori, Onari Seiichiro, Nakai Noriyuki, Machida Kazushige

PHYSICAL REVIEW B Vol. 91 ( 1 ) 2015.1

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

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

PHYSICAL REVIEW B Vol. 90 ( 3 ) 2014.7

High-T_c Superconductivity near the Anion Height Instability in Fe-Based Superconductors: Analysis of LaFeAsO_1-xH_x Reviewed

Seiichiro Onari, Youichi Yamakawa, and Hiroshi Kontani

Physical Review Letters Vol. 112 page： 187001_1-187001_5 2014

Effect of realistic finite-size impurities on T_c in Fe-based superconductors based on the five-orbital tight-binding model Reviewed

Youichi Yamakawa, Seiichiro Onari and Hiroshi Kontani

Physical Review B Vol. 87 page： 195121_1- 195121_10 2013

Superconducting Pairing Symmetry on the Extended Hubbard Model in the Presence of the Rashba-Type Spin-Orbit Coupling Reviewed Open Access

Keisuke Shigeta, Seiichiro Onari, and Yukio Tanaka

Journal of the Physical Society of Japan Vol. 82 page： 014702_1-014702_9 2013

Spin-Fluctuation-Driven Orbital Nematic Order in Ru-Oxides: Self-Consistent Vertex Correction Analysis for Two-Orbital Model Reviewed Open Access

Yusuke Ohno, Masahisa Tsuchiizu, Seiichiro Onari, and Hiroshi Kontani

Journal of the Physical Society of Japan Vol. 82 page： 013707_1-013707_4 2013

鉄系超伝導体における「軌道の物理」の新展開 Reviewed Open Access

大成　誠一郎, 紺谷　浩

日本物理学会誌 Vol. 68 ( 4 ) page： 231-235 2013

Orbital Nematic Instability in Two-Orbital Hubbard Model: Renormalization-Group + Constrained RPA Analysis Reviewed

Masahisa Tsuchiizu, Yusuke Ohno, Seiichiro Onari, Hiroshi Kontani

Physical Review Letters Vol. 111 page： 057003_1-057003_5 2013

Zigzag chain structure transition and orbital fluctuations in Ni-based superconductors Reviewed Open Access

Youichi Yamakawa, Seiichiro Onari, Hiroshi Kontani

Journal of the Physical Society of Japan Vol. 82 page： 094704_1-094704_6 2013

Nodal gap structure in Fe-based superconductors due to the competition between orbital and spin fluctuations Reviewed Open Access

Tetsuro Saito, Seiichiro Onari, Hiroshi Kontani

Physical Review B Vol. 88 page： 045115_1- 045115_11 2013

Study of phase diagram and superconducting states in LaFeAsO_1-xH_x based on the multiorbital extended Hubbard model Reviewed

Youichi Yamakawa, Seiichiro Onari, Hiroshi Kontani, Naoki Fujiwara, Soshi Iimura, Hideo Hosono

Physical Review B Vol. 88 page： 041106(R)_1- 041106(R)_5 2013

Possible Odd-Frequency Pairing in Quasi-One-Dimensional Organic Superconductors (TMTSF)₂X Reviewed

Keisuke Shigeta, Seiichiro Onari, and Yukio Tanaka

Journal of the Physical Society of Japan Vol. 82 page： 104702_1-104702_5 2013

Superconductivity in Ca_1-xLa_xFeAs₂: A Novel 112-Type Iron Pnictide with Arsenic Zigzag Bonds Reviewed

Naoyuki Katayama, Kazutaka Kudo, Seiichiro Onari, Tasuku Mizukami, Kento Sugawara, Yuki Sugiyama, Yutaka Kitahama, Keita Iba, Kazunori Fujimura, Naoki Nishimoto, Minoru Nohara, Hiroshi Sawa

Journal of the Physical Society of Japan Vol. 82 page： 123702_1-123702_4 2013

Phase diagram and superconducting states in LaFeAsO_1-xH_x based on the multiorbital extended Hubbard model Reviewed

Youichi Yamakawa, Seiichiro Onari, Hiroshi Kontani, Naoki Fujiwara, Soshi Iimura, Hideo Hosono

Physical Review B Vol. 88 page： 041106(R)_1- 041106(R)_5 2013

Non-Fermi-liquid transport phenomena and superconductivity driven by orbital fluctuations in iron pnictides: Analysis by fluctuation-exchange approximation Reviewed Open Access

Seiichiro Onari and Hiroshi Kontani

Physical Review B Vol. 85 page： 134507_1-134507_6 2012

Orbital fluctuation theory in iron-based superconductors: s₊₊-wave superconductivity, structure transition, and impurity-induced nematic order Reviewed

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

Solid State Communications Vol. 152 ( 8 ) page： 718-727 2012

Symmetry of superconducting pairing state in a staggered field Reviewed Open Access

Keisuke Shigeta, Seiichiro Onari, and Yukio Tanaka

Physical Review B Vol. 85 page： 224509_1-224509_13 2012

Self-Consistent Vertex Correction Analysis for Iron-Based Superconductors: Mechanism of Coulomb-Interaction-Driven Orbital Fluctuations Reviewed

Seiichiro Onari and Hiroshi Kontani

Physical Review Letters Vol. 109 page： 137001_1-137001_5 2012

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

Youichi Yamakawa, Seiichiro Onari and Hiroshi Kontani

Superconductor Science and Technology Vol. 25 page： 084006_1-084006_9 2012

Observation of the hole state symmetry of MgB₂ by inelastic scattering of fast electrons accompanied by boron K-shell excitation Reviewed

Koh Saitoh, Kota Momonoi, Nobuo Tanaka, and Seiichiro Onari

Journal of Applied Physics Vol. 112 page： 113920_1-113920_5 2012

Emergence of fully gapped s₊₊-wave and nodal d-wave states mediated by orbital and spin fluctuations in a ten-orbital model of KFe₂Se₂ Reviewed

Tetsuro Saito, Seiichiro Onari, and Hiroshi Kontani

Physical Review B Vol. 83 page： 140512-1-140512-4(R) 2011

Competition of pairing symmetries and a mechanism for Berezinskii pairing in quasi-one-dimensional systems Reviewed Open Access

Keisuke Shigeta, Yukio Tanaka, Kazuhiko Kuroki, Seiichiro Onari, and Hirohito Aizawa

Physical Review B Vol. 83 page： 140509_1-140509_4(R) 2011

Theory of the beta-Type Organic Superconductivity under Uniaxial Compression Reviewed

Takeo Suzuki, Seiichiro Onari, Hiroshi Ito, and Yukio Tanaka

Journal of the Physical Society of Japan Vol. 80 page： 094704_1-094704_8 2011

Origin of orthorhombic transition, magnetic transition, and shear-modulus softening in iron pnictide superconductors: Analysis based on the orbital fluctuations theory Reviewed Open Access

Hiroshi Kontani, Tetsuro Saito, and Seiichiro Onari

Physical Review B Vol. 84 page： 024528_1-024528_17 2011

Neutron inelastic scattering peak by dissipationless mechanism in the s₊₊-wave state in iron-based superconductors Reviewed

Seiichiro Onari and Hiroshi Kontani

Physical Review B Vol. 84 page： 144518_1-144518_9 2011

Study of non-Fermi-liquid-like state and pairing symmetry in iron pnictides based on the multiorbital Hubbard-Holstein model Reviewed

Seiichiro Onari and Hiroshi Kontani

Physica C Vol. 471 page： 670-674 2011

Structure of neutron-scattering peaks in both s₊₊-wave and s_±-wave states of an iron pnictide superconductor Reviewed

Seiichiro Onari, Hiroshi Kontani, and Masatoshi Sato

Physical Review B Vol. 81 page： 060504-1-060504-4(R) 2010.4

Spin Hall effect in a curved graphene with spin-orbit interaction Reviewed

Takashi Kato, Seiichiro Onari, Jun-ichiro Inoue

Physica E Vol. 42 page： 729-731 2010

Nonmagnetic impurity effects and neutron scattering spectrum in iron pnictides Reviewed

Seiichiro Onari, Hiroshi Kontani

Physica C Vol. 470 page： 1007-1009 2010

Orbital fluctuation theory in iron pnictides: Effects of As-Fe-As bond angle, isotope substitution, and Z²-orbital pocket on superconductivity Reviewed

Tetsuro Saito, Seiichiro Onari, and Hiroshi Kontani

Physical Review B Vol. 82 page： 144510-1-144510-10 2010

Orbital-Fluctuation-Mediated Superconductivity in Iron Pnictides: Analysis of the Five-Orbital Hubbard-Holstein Model Reviewed Open Access

Hiroshi Kontani, Seiichiro Onari

Physical Review Letters Vol. 104 page： 157001-1-157001-4 2010

Superconductivity of beta-type salts under uniaxial compression Reviewed

Hiroshi Ito, Tetsuo Ishihara, Masafumi Niwa, Takeo Suzuki, Seiichiro Onari, Yukio Tanaka,Jun-ichi Yamada, Hideki Yamochi, Gunzi Saito

Physica B Vol. 405 page： S262–S264 2010

Pnictogen height as a switch between high-Tc nodeless and low-Tc nodal pairings in the iron-based superconductors Reviewed

Kazuhiko Kuroki, Hidetomo Usui, Seiichiro Onari, Ryotaro Arita and Hideo Aoki

Physica C Vol. 470 page： S416-S417 2010

Density of state in the odd-frequency superconducting state in a quasi-one-dimensional system Reviewed

Keisuke Shigeta, Seiichiro Onari, Keiji Yada and Yukio Tanaka

Physica C Vol. 470 page： S959-S961 2010

Theory of Josephson Effect in Strongly Correlated Electron Systems Reviewed

Takehito Yokoyama, Seiichiro Onari, Yukio Tanaka

Physica C Vol. 470 page： S884-S885 2010

Theory of odd-frequency pairings on a quasi-one-dimensional lattice in the Hubbard model Reviewed Open Access

Keisuke Shigeta, Seiichiro Onari, Keiji Yada, and Yukio Tanaka

Physical Review B Vol. 79 page： 174507-1-174507-6 2009

Surface density of states of s_+-wave Cooper pairs in a two-band superconductor model Reviewed

Seiichiro Onari and Yukio Tanaka

Physical Review B Vol. 79 page： 174526-1-174526-6 2009

Violation of Anderson's Theorem for the Sign-Reversing s-Wave State of Iron-Pnictide Superconductors Reviewed Open Access

Seiichiro Onari, Hiroshi Kontani

Physical Review Letters Vol. 103 page： 177001-1-177001-4 2009

Electrically controlled superconducting states at the heterointerface SrTiO₃/LaAlO₃ Reviewed

Keiji Yada, Seiichiro Onari, Yukio Tanaka, and Jun-ichiro Inoue

Physical Review B Vol. 80 page： 140509-1-140509-4(R) 2009

Unconventional pairing originating from disconnected Fermi surfaces in the iron-based superconductor Reviewed Open Access

Kazuhiko Kuroki, Seiichiro Onari, Ryotaro Arita, Hidetomo Usui, Yukio Tanaka, Hiroshi Kontani, Hideo Aoki

New Journal of Physics Vol. 11 page： 025017_1-8 2009

Odd-frequency pairings in a non-centrosymmetric system Reviewed

Keiji Yada, Seiichiro Onari, and Yukio Tanaka

Physica C Vol. 469 page： 991-994 2009

Odd-frequency superconductivity on quasi-one-dimensional triangular lattice in the Hubbard model Reviewed

Keisuke Shigeta, Seiichiro Onari, Keiji Yada, Yukio Tanaka

Physica C Vol. 469 page： 988-990 2009

Superconductivity under uniaxial compression in beta-(BDA-TTP) salts Reviewed

Takeo Suzuki, Seiichiro Onari, Hiroshi Ito, Yukio Tanaka

Physica C Vol. 469 page： 979-981 2009

Theory of tunneling spectroscopy in LaFeAsO_1-xF_x Reviewed

Seiichiro Onari, Yukio Tanaka

Physica C Vol. 469 page： 912-914 2009

Pnictogen height as a possible switch between high-Tc nodeless and low-Tc nodal pairings in the iron-based superconductors Reviewed Open Access

Kazuhiko Kuroki, Hidetomo Usui, Seiichiro Onari, Ryotaro Arita, and Hideo Aoki

Physical Review B Vol. 79 page： 224511-1-224511-16 2009

Unconventional Superconductivity Originating from Disconnected Fermi Surfaces in the Iron-Based Oxypnictide Reviewed

K. Kuroki, S.Onari, R. Arita, H. Usui, Y. Tanaka, H. Kontani, and H. Aoki

Journal of the Physical Society of Japan, Supplement Vol. 77 page： 96-98 2008

Unified origin for superconductivity,magnetism, and large thermopower in Na_xCoO₂ Reviewed

Kazuhiko Kuroki, Shuhei Okubo, Takumi Nojima, Hidetomo Usui, Ryotaro Arita, Seiichiro Onari, Yukio Tanaka

Journal of Physics and Chemistry of Solids Vol. 69 page： 3360-3364 2008

Diagonalization Study on the extended Hubbard model in an anisotropic triangular lattice Reviewed

Ken Kanada, Tsutomu Watanabe, Seiichiro Onari and Yukio Tanaka

Journal of Physics and Chemistry of Solids Vol. 69 page： 3334-3336 2008

Odd-Frequency superconductivity in the 2D extended Hubbard model Reviewed

Keiji Yada, Yuichiro Shimokaji, Seiichiro Onari, Yuiko Tanaka and Kazumasa Miyake

Journal of Physics and Chemistry of Solids Vol. 69 page： 3321-3323 2008

Spin-triplet superconductivity induced by off-site Coulomb interaction in a triangular lattice Reviewed

Hiroshi Kimura, Seiichiro Onari and Yukio Tanaka

Journal of Physics and Chemistry of Solids Vol. 69 page： 3310-3312 2008

Electronic state on the surface in the strongly correlated electron systems Reviewed

Seiichiro Onari, Tetsuya Hata, Yukio Tanaka and Jun-ichiro Inoue

Journal of Physics and Chemistry of Solids Vol. 69 page： 3307-3309 2008

Odd-frequency superconductivity on the Hubbard model using the FLEX approximation Reviewed

Yuichiro Shimokaji, Seiichiro Onari, Yukio Tanaka and Kazumasa Miyake

Journal of Physics and Chemistry of Solids Vol. 69 page： 3280-3282 2008

Roles of spin fluctuation and frustration in the superconductivity of beta-(BDA-TTP)₂X (X=SbF₆,AsF₆) under uniaxial compression Reviewed

Hiroshi Ito, Tetsuo Ishihara, Hisaaki Tanaka, Shin-ichi Kuroda, Takeo Suzuki, Seiichiro Onari, Yukio Tanaka, Jun-ichi Yamada, and Koichi Kikuchi

Physical Review B Vol. 78 page： 172506-1- 172506-4 2008

Intrinsic spin Hall effect in graphene: Numerical calculations in a multiorbital model Reviewed Open Access

Seiichiro Onari, Yasuhito Ishikawa, Hiroshi Kontani, and Jun-ichiro Inoue

Physical Review B Vol. 78 page： 121403-1-121403-4 (R) 2008

Unconventional Pairing Originating from the Disconnected Fermi Surfaces of Superconducting LaFeAsO_1-xF_x Reviewed

Kazuhiko Kuroki, Seiichiro Onari, Ryotaro Arita, Hidetomo Usui, Yukio Tanaka, Hiroshi Kontani, and Hideo Aoki

Physical Review Letters Vol. 101 page： 087004-1-087004-4 2008

Theory of Fulde-Ferrell-Larkin-Ovchinnikov state of superconductors with and without inversion symmetry: Hubbard model approach Reviewed Open Access

Takehito Yokoyama, Seiichiro Onari, Yukio Tanaka

Journal of the Physical Society of Japan Vol. 77 page： 064711-1-064711-8 2008

Unified origin for superconductivity and 3D magnetism in Na_xCoO₂ Reviewed

Kazuhiko Kuroki, Shuhei Okubo, Takumi Nojima, Hidetomo Usui, Ryotaro Arita, Seiichiro Onari, Yukio Tanaka

Physica B Vol. 403 page： 1151-1153 2008

Spin-dependent Mass Enhancement under a Magnetic Field in the Periodic Anderson Model Reviewed Open Access

Seiichiro Onari, Hiroshi Kontani, and Yukio Tanaka

Journal of the Physical Society of Japan Vol. 77 page： 023703-1-023703-4 2008

Fluctuation exchange study on the double chain superconductor Pr₂Ba₄Cu₇O_15-δ Reviewed

Tsuguhito Nakano, Kazuhiko Kuroki, and Seiichiro Onari

Physica B Vol. 403 page： 1159-1161 2008

Anomalous transport phenomena in CeCoIn₅ close to quantum critical point Reviewed Open Access

Seiichiro Onari, Hiroshi Kontani, Yukio Tanaka

Journal of Magnetism and Magnetic Materials Vol. 310 page： 359-361 2007

Enhanced triplet superconductivity in noncentrosymmetric systems Reviewed Open Access

Takehito Yokoyama, Seiichiro Onari, Yukio Tanaka

Physical Review B Vol. 75 page： 172511-1-172511-4 2007

Variational Monte Carlo study of pairing symmetry in Sr₂RuO₄ Reviewed

Shogo Fujita, Tsutomu Watanabe, Seiichiro Onari, Hisatoshi Yokoyama,Yukio Tanaka, Jun-ichiro Inoue

Physica C Vol. 463-465 page： 134-137 2007

Quasiparticle density of states in high-Tc superconductors in the superconducting state Reviewed

T. Hata, S. Onari, S. Honda, H. Itoh, Y. Tanaka, J. Inoue

Physica C Vol. 463-465 page： 123-125 2007

Phase diagram of half-filled square lattice for frustrated Hubbard model Reviewed

Seiichiro Onari, Hisatoshi Yokoyama, Yukio Tanaka

Physica C Vol. 463-465 page： 120-122 2007

Superconductivity due to spin fluctuations originating from multiple Fermi surfaces in the double chain superconductor Pr₂Ba₄Cu₇O_15-δ Reviewed

Tsuguhito Nakano, Kazuhiko Kuroki and Seiichiro Onari

Physical Review B Vol. 76 page： 014515-1-014515-7 2007

Local density of states at zigzag edges of carbon nanotubes and graphene Reviewed Open Access

Ken-ichi Sasaki, Kentaro Sato, Riichiro Saito, Jie Jiang, Seiichiro Onari and Yukio Tanaka

Physical Review B Vol. 75 page： 235430-1-235430-7 2007

Unified Origin for the 3D Magnetism and Superconductivity in Na_xCoO₂ Reviewed

Kazuhiko Kuroki, Shuhei Ohkubo, Takumi Nojima, Ryotaro Arita, Seiichiro Onari, Yukio Tanaka

Physical Review Letters Vol. 98 page： 136401-1-136401-4 2007

Theory of Superconductivity of Carbon Nanotubes and Graphene Reviewed

K. Sasaki, J. Jiang, R. Saito, S. Onari, Y. Tanaka

Journal of the Physical Society of Japan Vol. 76 page： 033702-1-033702-4 2007

Superconductivity from a long-range interaction: a crossover between the electron gas and the lattice model Reviewed

Seiichiro Onari, Ryotaro Arita, Kazuhiko Kuroki, Hideo Aoki

Physical Review B Vol. 73 page： 014526-1-014526-5 2006

Transport phenomena in a three-dimensional system close to the magnetic quantum critical point: The conserving approximation with current vertex corrections Reviewed Open Access

Seiichiro Onari, Hiroshi Kontani, Yukio Tanaka

Physical Review B Vol. 73 page： 224434-1-224434-10 2006

Extended s-wave pairing originating from the a_1g band in Na_xCoO₂yH₂O: Single-band U-V model with fluctuation exchange method Reviewed

K. Kuroki, S. Onari, Y. Tanaka, R. Arita, T. Nojima

Physical Review B Vol. 73 page： 184503-1-184503-6 2006

Spin-Triplet Superconductivity Induced by Charge Fluctuations in Extended Hubbard Model Reviewed

Seiichiro Onari, Ryotaro Arita, Kazuhiko Kuroki, Hideo Aoki

Journal of the Physical Society of Japan Vol. 74 ( 9 ) page： 2579-2585 2005.9

Phase diagram of the two-dimensional extended Hubbard model: pairing from charge and spin fluctuations Reviewed

Seiichiro Onari, Ryotaro Arita, Kazuhiko Kuroki, Hideo Aoki

Physica B Vol. 359-361 page： 518-520 2005

Off-site repulsion-induced triplet pairing: DCA and FLEX study for Sr₂RuO₄ Reviewed

Ryotaro Arita, Seiichiro Onari, Kazuhiko Kuroki, Hideo Aoki

Physica B Vol. 359-361 page： 584-586 2005

Off-site repulsion-induced triplet superconductivity: A possibility for chiral p_xy-wave pairing in Sr₂RuO₄ Reviewed

Ryotaro Arita, Seiichiro Onari, Kazuhiko Kuroki, Hideo Aoki

Physical Review Letters Vol. 92 page： 247006-1-247006-4 2004

Phase diagram of the two-dimensional extended Hubbard model: Phase transitions between different pairing symmetries when charge and spin fluctuations coexist Reviewed Open Access

Seiichiro Onari, Ryotaro Arita, Kazuhiko Kuroki, Hideo Aoki

Physical Review B Vol. 70 page： 094523-1-094523-6 2004

Superconductivity in repulsive electron systems with three-dimensional disconnected Fermi surfaces Reviewed Open Access

Seiichiro Onari, Ryotaro Arita, Kazuhiko Kuroki, Hideo Aoki

Physical Review B Vol. 68 page： 024525-1-024525-7 2003

Effect of inter-band nesting on superconductivity in stacked honeycomb lattices Reviewed

Seiichiro Onari, Kazuhiko Kuroki, Ryotaro Arita and Hideo Aoki

Physica B Vol. 329 page： 1437-1439 2003

Superconductivity induced by interband nesting in the three-dimensional honeycomb lattice Reviewed

Seiichiro Onari, Kazuhiko Kuroki, Ryotaro Arita, Hideo Aoki

Physical Review B Vol. 65 page： 184525-1-184525-6 2002

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