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Microscopic theories on the excitonic Bose condensation and superconductivity in strongly correlated systems

Research Project

Project/Area Number 26400349
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Condensed matter physics II
Research InstitutionChiba University

Principal Investigator

OHTA Yukinori  千葉大学, 大学院理学研究科, 教授 (70168954)

Co-Investigator(Renkei-kenkyūsha) YAMADA Atsushi  千葉大学, 大学院理学研究科, 准教授 (10251399)
KONISHI Takehisa  千葉大学, 大学院融合科学研究科, 准教授 (40302525)
SEKI Kazuhiro  理化学研究所, 柚木計算物性物理研究室, 基礎科学特別研究員 (40708533)
Research Collaborator KANEKO Tatsuya  理化学研究所, 柚木計算物性物理研究室, 基礎科学特別研究員 (30784433)
SUGIMOTO Koudai  千葉大学, 先進科学センター, 特任助教 (70756072)
NISHIMOTO Satoshi  IFW-Dresden and TU-Dresden
EJIMA Satoshi  Univ. Greifswald
FEHSKE Holger  Univ. Greifswald
Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords物性理論 / 強相関電子系 / 励起子凝縮 / 励起子絶縁体 / 遷移金属カルコゲナイド / コバルト酸化物 / 多極子 / 変分クラスター近似 / 強相関系 / 磁気多極子
Outline of Final Research Achievements

Renewed attention has recently been attracted to the excitonic insulator (EI) state, i.e., the state of electron-hole pair condensation in thermal equilibrium. In our research project, we have developed theoretical studies on candidate materials such as Ta2NiSe5 using the variational cluster and other approximations and obtained the results concerning: (1) the relative stability of the EI states caused by the electron-phonon and Hund's rule couplings, (2) the origin of the flat band observed in the angle-resolved photoemission spectra of Ta2NiSe5, (3) prediction of the coherence peak in the ultrasonic attenuation of Ta2NiSe5, (4) anomalous behavior of the orbital susceptibility in the EI state and Ta2NiSe5, and (5) magnetic multipole order and collective-mode excitations in a cobalt oxide material.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (82 results)

All 2017 2016 2015 2014 Other

All Int'l Joint Research (2 results) Journal Article (21 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 21 results,  Acknowledgement Compliant: 20 results,  Open Access: 8 results) Presentation (57 results) (of which Int'l Joint Research: 10 results,  Invited: 4 results) Remarks (2 results)

  • [Int'l Joint Research] IFWドレスデン研究所/ドレスデン工科大学(ドイツ)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] グライフスト大学/IFWドレスデン研究所/ドレスデン工科大学(ドイツ)

    • Related Report
      2015 Research-status Report
  • [Journal Article] Mott transition and magnetism of the triangular-lattice Hubbard model with next-nearest-neighbor hopping2017

    • Author(s)
      K. Misumi, T. Kaneko, Y. Ohta
    • Journal Title

      Physical Review B

      Volume: 95 Issue: 7

    • DOI

      10.1103/physrevb.95.075124

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Reversed Crystal-Field Splitting and Spin-Orbital Ordering in alpha-Sr2CrO42017

    • Author(s)
      T. Ishikawa, T. Toriyama, T. Konishi, H. Sakurai, Y. Ohta
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 86 Issue: 3 Pages: 033701-033701

    • DOI

      10.7566/jpsj.86.033701

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Low-energy excitation spectra in the excitonic phase of cobalt oxides2017

    • Author(s)
      Tomoki Yamaguchi, Koudai Sugimoto, and Yukinori Ohta
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 86 Issue: 4 Pages: 043701-043701

    • DOI

      10.7566/jpsj.86.043701

    • NAID

      210000134323

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Coherence Factors and Quantum Interferences in Excitonic Condensation of Ta2NiSe52017

    • Author(s)
      Koudai Sugimoto, Tatsuya Kaneko, and Yukinori Ohta
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 807 Issue: 11 Pages: 112001-112001

    • DOI

      10.1088/1742-6596/807/11/112001

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] 相関電子系における励起子凝縮の物理の新展開2017

    • Author(s)
      太田幸則,金子竜也,杉本高大
    • Journal Title

      固体物理(アグネ技術センター)

      Volume: 52 Pages: 119-137

    • NAID

      40021137326

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Phase Diagram of the Frustrated Square-lattice Hubbard Model: Variational Cluster Approach2016

    • Author(s)
      K. Misumi, T. Kaneko, Y. Ohta
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 85 Issue: 6 Pages: 064711-064711

    • DOI

      10.7566/jpsj.85.064711

    • NAID

      40020851968

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Mott Transition and Staggered Orders in the Three-component Fermionic System: Variational Cluster Approach2016

    • Author(s)
      T. Hasunuma, T. Kaneko, S. Miyakoshi and Y. Ohta
    • Journal Title

      Journal of Physics Society of Japan

      Volume: 85 Issue: 7 Pages: 074704-074711

    • DOI

      10.7566/jpsj.85.074704

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Orbital diamagnetic susceptibility in excitonic condensation phase2016

    • Author(s)
      Koudai Sugimoto and Yukinori Ohta
    • Journal Title

      Physical Review B

      Volume: 94 Issue: 8 Pages: 085111-085111

    • DOI

      10.1103/physrevb.94.085111

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Electric and magnetic multipoles and bond orders in excitonic insulators2016

    • Author(s)
      T. Kaneko, Y. Ohta
    • Journal Title

      Physical Review B

      Volume: 94 Issue: 12

    • DOI

      10.1103/physrevb.94.125127

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Entanglement properties of the Haldane phases: A finite system-size approach2016

    • Author(s)
      S. Miyakoshi, S. Nishimoto and Y. Ohta
    • Journal Title

      Physical Review B

      Volume: 94 Issue: 23 Pages: 235155-235166

    • DOI

      10.1103/physrevb.94.235155

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Microscopic quantum interference in excitonic condensation of Ta2NiSe52016

    • Author(s)
      K. Sugimoto, T. Kaneko, and Y. Ohta
    • Journal Title

      Physical Review B

      Volume: 93 Issue: 4

    • DOI

      10.1103/physrevb.93.041105

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Competition between excitonic charge and spin density waves: Influence of electron-phonon and Hund's rule couplings2015

    • Author(s)
      T. Kaneko, B. Zenker, H. Fehske, and Y. Ohta
    • Journal Title

      Physical Review B

      Volume: 92 Issue: 11

    • DOI

      10.1103/physrevb.92.115106

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Novel Electronic Structures of Ru-Pnictides RuPn (Pn=P, As, Sb)2015

    • Author(s)
      H. Goto, T. Toriyama, T. Konishi, and Y. Ohta
    • Journal Title

      Physics Procedia

      Volume: 75 Pages: 91-99

    • DOI

      10.1016/j.phpro.2015.12.013

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Coexistence of magnetic and topological phases in the asymmetric Kane-Mele-Hubbard model2015

    • Author(s)
      S. Miyakoshi, Y. Ohta
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 592 Pages: 012129-012129

    • DOI

      10.1088/1742-6596/592/1/012129

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Dimensional crossover of the superfluid state in the attractive Hubbard model2015

    • Author(s)
      N. Ogawa, T. Kaneko and Y. Ohta
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 592 Pages: 012103-012103

    • DOI

      10.1088/1742-6596/592/1/012103

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Frustration and magnetic orderings in the square-lattice Hubbard model with anisotropic next-nearest-neighbor hopping2015

    • Author(s)
      K. Misumi, T. Kaneko, and Y. Ohta
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 592 Pages: 012113-012113

    • DOI

      10.1088/1742-6596/592/1/012113

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Excitonic phases in the two-orbital Hubbard model: Roles of Hund’s rule coupling2015

    • Author(s)
      T. Kaneko and Y. Ohta
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 592 Pages: 012096-012096

    • DOI

      10.1088/1742-6596/592/1/012096

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Metal-insulator transition of Dirac Fermions: Variational cluster study2015

    • Author(s)
      M. Ebato, T. Kaneko, and Y. Ohta
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 84 Issue: 4 Pages: 044714-044714

    • DOI

      10.7566/jpsj.84.044714

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Charge and orbital orderings associated with metal-insulator transition in V_6O_<13>2014

    • Author(s)
      T. Toriyama, et al.
    • Journal Title

      Physical Review B

      Volume: 90 Issue: 8

    • DOI

      10.1103/physrevb.90.085131

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Journal Article] Excitonic Bose-Einstein condensation in Ta2NiSe5 above room temperature2014

    • Author(s)
      K. Seki, Y. Wakisaka, T. Kaneko, T. Toriyama, T. Konishi, T. Sudayama, N. L. Saini, M. Arita, H. Namatame, M. Taniguchi, N. Katayama, M. Nohara, H. Takagi, T. Mizokawa, and Y. Ohta
    • Journal Title

      Physical Review B

      Volume: 90 Issue: 15 Pages: 155116-155116

    • DOI

      10.1103/physrevb.90.155116

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Roles of Hund’s rule coupling in excitonic density wave states2014

    • Author(s)
      T. Kaneko and Y. Ohta
    • Journal Title

      Physical Review B

      Volume: 90 Issue: 24

    • DOI

      10.1103/physrevb.90.245144

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] TiSe2のCDW転移における電子相関の役割2017

    • Author(s)
      金子竜也, 太田幸則, 柚木清司
    • Organizer
      日本物理学会
    • Place of Presentation
      大阪大学(大阪府・豊中市)
    • Year and Date
      2017-03-17
    • Related Report
      2016 Annual Research Report
  • [Presentation] バンド縮退を持つ電子正孔系の新しい金属絶縁体転移 - 励起子凝縮系としてのTa2NiSe5 の新展開2017

    • Author(s)
      太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      大阪大学(大阪府・豊中市)
    • Year and Date
      2017-03-17
    • Related Report
      2016 Annual Research Report
  • [Presentation] Pr0.5Ca0.5CoO3の励起子相における低エネルギー磁気励起スペクトル2017

    • Author(s)
      山口伴紀, 杉本高大, 太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      大阪大学(大阪府・豊中市)
    • Year and Date
      2017-03-17
    • Related Report
      2016 Annual Research Report
  • [Presentation] GW近似による励起子絶縁体Ta2NiSe5の電子状態計算2017

    • Author(s)
      杉本高大, 西本理, 金子竜也, 太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      大阪大学(大阪府・豊中市)
    • Year and Date
      2017-03-17
    • Related Report
      2016 Annual Research Report
  • [Presentation] 三角格子系の励起子相とk空間スピンテクスチャー2017

    • Author(s)
      西田尚央, 宮腰祥平, 金子竜也, 太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      大阪大学(大阪府・豊中市)
    • Year and Date
      2017-03-17
    • Related Report
      2016 Annual Research Report
  • [Presentation] 反周期境界条件におけるエンタングルメントスペクトラム2017

    • Author(s)
      宮腰祥平, 西本理, 太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      大阪大学(大阪府・豊中市)
    • Year and Date
      2017-03-17
    • Related Report
      2016 Annual Research Report
  • [Presentation] Sr2MO4 (M=V, Cr)の分光研究2017

    • Author(s)
      津田俊輔, 櫻井裕也, 菊川直樹, 宇治進也, 山岡人志, 沢田正博, 佐藤仁, Awabaikeli Rousuli, 有田将司, 島田賢也, 鳥山達矢, 石川貴史, 太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      大阪大学(大阪府・豊中市)
    • Year and Date
      2017-03-17
    • Related Report
      2016 Annual Research Report
  • [Presentation] 層状ぺロブスカイト型遷移金属酸化物の新展開: Sr2CrO4の理論2017

    • Author(s)
      太田幸則
    • Organizer
      物性研研究会
    • Place of Presentation
      東京大学物性研究所(千葉県・柏市)
    • Related Report
      2016 Annual Research Report
  • [Presentation] Ta2NiSe5における光学伝導度と磁化率2016

    • Author(s)
      杉本高大, 金子竜也, 太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      金沢大学(石川県・金沢市)
    • Year and Date
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] CDIA による励起子相の研究2016

    • Author(s)
      濱田晃輔, 金子竜也, 宮腰祥平, 太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      金沢大学(石川県・金沢市)
    • Year and Date
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] 多軌道Hubbard模型の励起子相における低エネルギー励起スペクトル2016

    • Author(s)
      山口伴紀, 杉本高大, 宮腰祥平, 太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      金沢大学(石川県・金沢市)
    • Year and Date
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] 励起子相におけるクロスホッピングの効果2016

    • Author(s)
      西田尚央, 金子竜也, 宮腰祥平, 太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      金沢大学(石川県・金沢市)
    • Year and Date
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] d-p模型を用いた1T-TiSe2の理論的研究2016

    • Author(s)
      金子竜也, 杉本高大, 太田幸則, 柚木清司
    • Organizer
      日本物理学会
    • Place of Presentation
      金沢大学(石川県・金沢市)
    • Year and Date
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] 一般の整数スピン鎖における対称性によって保護された自明相の数値的研究2016

    • Author(s)
      宮腰祥平, 西本理, 太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      金沢大学(石川県・金沢市)
    • Year and Date
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] Excitonic phases in correlated electron systems and Ta2NiSe52016

    • Author(s)
      Y. Ohta, T. Kaneko, K. Sugimoto, K. Hamada, H. Nishida
    • Organizer
      SCES (International Conference on Strongly Correlated Electron Systems)
    • Place of Presentation
      Hangzhou, China
    • Year and Date
      2016-05-08
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Coherence Factors and Quantum Interferences in Excitonic Condensation of Ta2NiSe52016

    • Author(s)
      K. Sugimoto, T. Kaneko, Y. Ohta
    • Organizer
      SCES (International Conference on Strongly Correlated Electron Systems)
    • Place of Presentation
      Hangzhou, China
    • Year and Date
      2016-05-08
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effects of single ion anisotropy and bond alternation in the S=2 Heisenberg model2016

    • Author(s)
      S. Miyakoshi, S. Nishimoto, Y. Ohta
    • Organizer
      SCES (International Conference on Strongly Correlated Electron Systems)
    • Place of Presentation
      Hangzhou, China
    • Year and Date
      2016-05-08
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] S=2反強磁性ハイゼンベルグ鎖におけるボンド交替と1イオン異方性の効果2016

    • Author(s)
      宮腰祥平,西本理,太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      東北学院大学(宮城県・仙台市)
    • Year and Date
      2016-03-19
    • Related Report
      2015 Research-status Report
  • [Presentation] 励起子絶縁体の電荷・スピン密度分布2016

    • Author(s)
      金子竜也,西田尚央,濱田晃輔,太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      東北学院大学(宮城県・仙台市)
    • Year and Date
      2016-03-19
    • Related Report
      2015 Research-status Report
  • [Presentation] 二軌道ハバード模型の励起子相における軌道磁化率2016

    • Author(s)
      杉本高大, 太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      東北学院大学(宮城県・仙台市)
    • Year and Date
      2016-03-19
    • Related Report
      2015 Research-status Report
  • [Presentation] Entanglement properties of the bond alternating Heisenberg chain with general integer spins2016

    • Author(s)
      S. Miyakoshi, S. Nishimoto, Y. Ohta
    • Organizer
      APS March Meeting
    • Place of Presentation
      Baltimore, MD, USA
    • Year and Date
      2016-03-14
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] 励起子凝縮の理論とTa2NiSe5の電子状態2016

    • Author(s)
      太田幸則
    • Organizer
      第17回CROSSroads研究会「強相関電子系の凝縮状態」
    • Place of Presentation
      いばらき量子ビーム研究センター(茨城県・東海村)
    • Year and Date
      2016-01-18
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] エキシトニック相の理論とTa2NiSe5の電子状態2015

    • Author(s)
      太田幸則
    • Organizer
      物性研短期研究会「低次元電子系におけるエキシトニック相の新展開」
    • Place of Presentation
      東京大学物性研究所(千葉県・柏市)
    • Year and Date
      2015-11-26
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] 励起子凝縮の理論とTa2NiSe5の電子状態2015

    • Author(s)
      太田幸則
    • Organizer
      第16回CROSSroads研究会「電子物性とその将来」
    • Place of Presentation
      いばらき量子ビーム研究センター(茨城県・東海村)
    • Year and Date
      2015-10-14
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] Entanglement properties of the S≧2 dimerized Heisenberg model2015

    • Author(s)
      宮腰祥平, 西本理, 太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      関西大学(大阪府・吹田市)
    • Year and Date
      2015-09-16
    • Related Report
      2015 Research-status Report
  • [Presentation] 三角格子ハバード模型の金属絶縁体転移:次近接ホッピングの効果2015

    • Author(s)
      三角一真, 金子竜也, 太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      関西大学(大阪府・吹田市)
    • Year and Date
      2015-09-16
    • Related Report
      2015 Research-status Report
  • [Presentation] レーザー角度分解光電子分光によるIr1-xPtxTe2の超伝導ギャップの直接観測2015

    • Author(s)
      大槻太毅, 溝川貴司, N.L. Saini, 大田由一, 山本遇哲, 橋本嵩広, 岡崎浩三, 辛埴, 藤森淳, 鳥山達矢, 小西健久, 太田幸則, 卞舜生, 工藤一貴, 野原実
    • Organizer
      日本物理学会
    • Place of Presentation
      関西大学(大阪府・吹田市)
    • Year and Date
      2015-09-16
    • Related Report
      2015 Research-status Report
  • [Presentation] 励起子絶縁体Ta2NiSe5におけるコヒーレンスピーク2015

    • Author(s)
      杉本高大、金子竜也, 太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      関西大学(大阪府・吹田市)
    • Year and Date
      2015-09-16
    • Related Report
      2015 Research-status Report
  • [Presentation] Ru1-xRhxPn (Pn=P,As,Sb) の電子構造2015

    • Author(s)
      後藤広樹, 鳥山達矢, 小西健久, 太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      関西大学(大阪府・吹田市)
    • Year and Date
      2015-09-16
    • Related Report
      2015 Research-status Report
  • [Presentation] 層状ペロブスカイトα-Sr2CrO4における配位子場分裂の逆転とスピン・軌道秩序2015

    • Author(s)
      石川貴史, 鳥山達也, 小西健久, 桜井裕也, 太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      関西大学(大阪府・吹田市)
    • Year and Date
      2015-09-16
    • Related Report
      2015 Research-status Report
  • [Presentation] 励起子相に対する電子-格子相互作用の寄与2015

    • Author(s)
      金子竜也, Bernd Zenker, Holger Fehske, 太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      関西大学(大阪府・吹田市)
    • Year and Date
      2015-09-16
    • Related Report
      2015 Research-status Report
  • [Presentation] 電荷移動型モット絶縁体における励起子相の可能性2015

    • Author(s)
      濱田晃輔, 金子竜也, 太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      関西大学(大阪府・吹田市)
    • Year and Date
      2015-09-16
    • Related Report
      2015 Research-status Report
  • [Presentation] フラストレートしたハニカム格子ハバード模型における金属絶縁体転移2015

    • Author(s)
      西田尚央, 三角一真, 金子竜也, 太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      関西大学(大阪府・吹田市)
    • Year and Date
      2015-09-16
    • Related Report
      2015 Research-status Report
  • [Presentation] Excitonic condensation and superconductivity in Ta2NiSe52015

    • Author(s)
      Y. Ohta, T. Kaneko, K. Seki, T. Toriyama, T. Konishi
    • Organizer
      ICM2015
    • Place of Presentation
      Barcelona, Spain
    • Year and Date
      2015-07-05
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Novel electronic structures in ru-pnictides RuPn (Pn = P, As, Sb)2015

    • Author(s)
      H. Goto, T. Toriyama, T. Konishi, Y. Ohta
    • Organizer
      ICM2015
    • Place of Presentation
      Barcelona, Spain
    • Year and Date
      2015-07-05
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Novel spin and orbital orderings in the layered perovskite Sr2CrO42015

    • Author(s)
      T. Ishikawa, T. Toriyama, T. Konishi, H. Sakurai, Y. Ohta
    • Organizer
      ICM2015
    • Place of Presentation
      Barcelona, Spain
    • Year and Date
      2015-07-05
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Quantum disordered phase in the frustrated honeycomb Hubbard model2015

    • Author(s)
      H. Nishida, K. Misumi, T. Kaneko, Y. Ohta
    • Organizer
      ICM2015
    • Place of Presentation
      Barcelona, Spain
    • Year and Date
      2015-07-05
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Quantum disordered phase in the triangular-lattice Hubbard model with next-nearest-neighbor hopping2015

    • Author(s)
      K. Misumi, T. Kaneko, Y. Ohta
    • Organizer
      ICM2015
    • Place of Presentation
      Barcelona, Spain
    • Year and Date
      2015-07-05
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Excitonic phases in the two-band Hubbard model with electron-phonon coupling2015

    • Author(s)
      T. Kaneko, Y. Ohta
    • Organizer
      ICM2015
    • Place of Presentation
      Barcelona, Spain
    • Year and Date
      2015-07-05
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Ta2NiSe5の励起子ボーズ・アインシュタイン凝縮および関連物質の理論2015

    • Author(s)
      太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2015-03-21 – 2015-03-24
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] Ta2NiSe5の高圧下電子状態2015

    • Author(s)
      金子竜也,鳥山達矢,太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2015-03-21 – 2015-03-24
    • Related Report
      2014 Research-status Report
  • [Presentation] π-flux Hubbard模型の金属絶縁体転移:変分クラスター近似による研究2015

    • Author(s)
      繪鳩眞輝,金子竜也,太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2015-03-21 – 2015-03-24
    • Related Report
      2014 Research-status Report
  • [Presentation] 異方的次近接正方格子ハバード模型の磁気相図2015

    • Author(s)
      三角一真,金子竜也,太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2015-03-21 – 2015-03-24
    • Related Report
      2014 Research-status Report
  • [Presentation] 2次元光格子中の3成分フェルミ原子系における超流動状態2015

    • Author(s)
      蓮沼匠,金子竜也,太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2015-03-21 – 2015-03-24
    • Related Report
      2014 Research-status Report
  • [Presentation] 層状ペロブスカイトα-Sr2CrO4における逐次相転移の起源2015

    • Author(s)
      石川貴史,鳥山達矢,小西健久,桜井裕也,太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2015-03-21 – 2015-03-24
    • Related Report
      2014 Research-status Report
  • [Presentation] 励起子密度波状態の安定性に関する理論的研究2014

    • Author(s)
      金子竜也,太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      中部大学
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Research-status Report
  • [Presentation] 2次元光格子中の3成分フェルミ原子系におけるスタッガード秩序状態2014

    • Author(s)
      蓮沼匠,金子竜也,太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      中部大学
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Research-status Report
  • [Presentation] Hofstadter模型に対する電子相関効果2014

    • Author(s)
      宮腰祥平,金子竜也,太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      中部大学
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Research-status Report
  • [Presentation] 引力Hubbard模型における超流動状態の次元クロスオーバー2014

    • Author(s)
      小川直輝,金子竜也,太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      中部大学
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Research-status Report
  • [Presentation] バナジウム酸化物V6O13における電荷・軌道秩序を伴う金属絶縁体転移の理論2014

    • Author(s)
      鳥山達矢,小西健久,太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      中部大学
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Research-status Report
  • [Presentation] t1-t2-t3Hubbard模型のフラストレーションと磁気秩序:変分クラスター近似による解析2014

    • Author(s)
      三角一真,金子竜也,太田幸則
    • Organizer
      日本物理学会
    • Place of Presentation
      中部大学
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Research-status Report
  • [Presentation] Coexistence of magnetic and topological orders in the anisotropic Kane-Mele-Hubbard model2014

    • Author(s)
      S. Miyakoshi, Y. Ohta
    • Organizer
      SCES2014
    • Place of Presentation
      Grenoble, France
    • Year and Date
      2014-07-07 – 2014-07-11
    • Related Report
      2014 Research-status Report
  • [Presentation] Frustration and magnetic orderings in the triangular-lattice Hubbard model with next-nearest-neighbor hopping2014

    • Author(s)
      K. Misumi, T. Kaneko, Y. Ohta
    • Organizer
      SCES2014
    • Place of Presentation
      Grenoble, France
    • Year and Date
      2014-07-07 – 2014-07-11
    • Related Report
      2014 Research-status Report
  • [Presentation] Dimensional crossover of the superfluid state in the attractive Hubbard model2014

    • Author(s)
      N. Ogawa, T. Kaneko, Y. Ohta
    • Organizer
      SCES2014
    • Place of Presentation
      Grenoble, France
    • Year and Date
      2014-07-07 – 2014-07-11
    • Related Report
      2014 Research-status Report
  • [Presentation] Excitonic phases in the multi-orbital Hubbard model2014

    • Author(s)
      T. Kaneko, Y. Ohta
    • Organizer
      SCES2014
    • Place of Presentation
      Grenoble, France
    • Year and Date
      2014-07-07 – 2014-07-11
    • Related Report
      2014 Research-status Report
  • [Presentation] Hidden band Jahn-Teller instability in the single trellis layer of V6O132014

    • Author(s)
      T. Toriyama, T. Nakayama, T. Konishi, Y. Ohta
    • Organizer
      SCES2014
    • Place of Presentation
      Grenoble, France
    • Year and Date
      2014-07-07 – 2014-07-11
    • Related Report
      2014 Research-status Report
  • [Presentation] Three-component fermionic atoms in optical lattices: Variational cluster study2014

    • Author(s)
      T. Hasunuma, T. Kaneko, Y. Ohta
    • Organizer
      SCES2014
    • Place of Presentation
      Grenoble, France
    • Year and Date
      2014-07-07 – 2014-07-11
    • Related Report
      2014 Research-status Report
  • [Remarks] 千葉大学 強相関電子系理論研究室(太田研究室)ホームページ

    • URL

      http://physics.s.chiba-u.ac.jp/ohtal/

    • Related Report
      2016 Annual Research Report
  • [Remarks] 強相関電子系理論研究室(太田研究室)ホームページ

    • URL

      http://physics.s.chiba-u.ac.jp/ohtal/index.html

    • Related Report
      2015 Research-status Report

URL: 

Published: 2014-04-04   Modified: 2020-05-15  

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