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Research on electronic states using a microscopic model for high-temperature superconductors

Research Project

Project/Area Number 26400372
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Condensed matter physics II
Research InstitutionNational Institute for Materials Science

Principal Investigator

Kohno Masanori  国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, 主幹研究員 (40370308)

Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords高温超伝導体 / モット転移 / t-Jモデル / クラスター摂動理論 / 擬ギャップ / ドーピング誘起状態 / 動的密度行列繰り込み群法 / スピンと電荷の分離 / 電子状態 / 高温超伝導 / 数値計算 / 磁気励起
Outline of Final Research Achievements

To comprehensively understand the properties of cuprate high-temperature superconductors from the microscopic level, the electronic states of the two-dimensional t-J model, which is a model derivable from atomic orbitals of high-temperature superconductors, are investigated, and various anomalous features observed in cuprate high-temperature superconductors are collectively explained as properties near the Mott transition. In addition, by using t-J models, the emergence of states in the gap by doping a Mott insulator, which is a distinctive feature of the Mott transition, is investigated, and it is shown that double occupancy is not essential to this feature and that this feature can be interpreted as the emergence of low-energy spin excited states of a Mott insulator in the electronic excitation spectrum with the dispersion relation shifted by the Fermi momentum by doping a Mott insulator, reflecting the spin-charge separation of the Mott insulator.

Report

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

    (22 results)

All 2017 2016 2015 2014 Other

All Journal Article (7 results) (of which Peer Reviewed: 7 results,  Open Access: 5 results,  Acknowledgement Compliant: 4 results) Presentation (14 results) (of which Int'l Joint Research: 3 results,  Invited: 4 results) Remarks (1 results)

  • [Journal Article] Mott Transition and Electronic States of High-Temperature Superconductors―New Development from the Hubbard Model2016

    • Author(s)
      河野昌仙
    • Journal Title

      Butsuri

      Volume: 71 Issue: 8 Pages: 533-540

    • DOI

      10.11316/butsuri.71.8_533

    • NAID

      130005282502

    • ISSN
      0029-0181, 2423-8872
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spectral properties near the Mott transition in the two-dimensional t-J model2015

    • Author(s)
      Masanori Kohno
    • Journal Title

      Physical Review B

      Volume: 92 Issue: 8 Pages: 085128-085128

    • DOI

      10.1103/physrevb.92.085128

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] States induced in the single-particle spectrum by doping a Mott insulator2015

    • Author(s)
      Masanori Kohno
    • Journal Title

      Physical Review B

      Volume: 92 Issue: 8 Pages: 085129-085129

    • DOI

      10.1103/physrevb.92.085129

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Doping-induced States in the Single-particle Spectrum Originating from Magnetic Excitation of a Mott Insulator2015

    • Author(s)
      Masanori Kohno
    • Journal Title

      Physics Procedia

      Volume: 75 Pages: 206-213

    • DOI

      10.1016/j.phpro.2015.12.026

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Spectral properties near the Mott transition in the two-dimensional Hubbard model with next-nearest-neighbor hopping2014

    • Author(s)
      Masanori Kohno
    • Journal Title

      Physical Review B

      Volume: 90 Issue: 3 Pages: 035111-035111

    • DOI

      10.1103/physrevb.90.035111

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Experimental confirmation of spin gap in antiferromagnetic alternating spin-3/2 chain substances RCrGeO5 (R = Y or 154Sm) by inelastic neutron scattering experiments2014

    • Author(s)
      Masashi Hase, Minoru Soda, Takatsugu Masuda, Daichi Kawana, Tetsuya Yokoo, Shinichi Itoh, Akira Matsuo, Koichi Kindo, and Masanori Kohno
    • Journal Title

      Phys. Rev. B

      Volume: 90 Issue: 2 Pages: 024416-024416

    • DOI

      10.1103/physrevb.90.024416

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Journal Article] Relationship between Single-Particle Excitation and Spin Excitation at the Mott Transition2014

    • Author(s)
      Masanori Kohno
    • Journal Title

      JPS Conference Proceedings

      Volume: 3 Pages: 013020-013020

    • DOI

      10.7566/jpscp.3.013020

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] States induced in the single-particle spectrum by infinitesimal doping of a Mott insulator2017

    • Author(s)
      Masanori Kohno
    • Organizer
      APS March Meeting 2017
    • Place of Presentation
      New Orleans Convention Center
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] モット転移の新しい描像2017

    • Author(s)
      河野昌仙
    • Organizer
      鈴木増雄先生傘寿記念ワークショップ
    • Place of Presentation
      東京大学
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] サイト間Coulomb相互作用が生み出す電荷自由度のBerezinskii-Kosterlitz-Thouless相の数値的検証2017

    • Author(s)
      金子隆威, 野々村禎彦, 河野昌仙
    • Organizer
      第72回日本物理学会年次大会
    • Place of Presentation
      大阪大学
    • Related Report
      2016 Annual Research Report
  • [Presentation] t-Jモデルのドーピング誘起状態2016

    • Author(s)
      河野昌仙
    • Organizer
      第71回日本物理学会年次大会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2016-03-19
    • Related Report
      2015 Research-status Report
  • [Presentation] Spectral properties of the two-dimensional t-J model near the Mott transition2016

    • Author(s)
      Masanori Kohno
    • Organizer
      APS March Meeting 2016
    • Place of Presentation
      ボルチモア(アメリカ)
    • Year and Date
      2016-03-16
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] モット転移における電子状態の変化2016

    • Author(s)
      河野昌仙
    • Organizer
      筑波大学物性セミナー
    • Place of Presentation
      筑波大学
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] 反強磁性秩序状態からのドーピング誘起状態2016

    • Author(s)
      河野昌仙
    • Organizer
      日本物理学会年次大会2016年秋季大会
    • Place of Presentation
      金沢大学
    • Related Report
      2016 Annual Research Report
  • [Presentation] 梯子ハバードおよびt-Jモデルのドーピング誘起状態2015

    • Author(s)
      河野昌仙
    • Organizer
      日本物理学会2015年秋季大会
    • Place of Presentation
      関西大学
    • Year and Date
      2015-09-19
    • Related Report
      2015 Research-status Report
  • [Presentation] モット転移近傍の電子状態2015

    • Author(s)
      河野昌仙
    • Organizer
      物性研理論セミナー
    • Place of Presentation
      東京大学物性研究所
    • Year and Date
      2015-07-17
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] Doping-induced single-particle states due to magnetic excitation of a Mott insulator2015

    • Author(s)
      Masanori Kohno
    • Organizer
      The 20th International Conference on Magnetism
    • Place of Presentation
      バルセロナ(スペイン)
    • Year and Date
      2015-07-10
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] モット転移における無限小ドーピング誘起状態2015

    • Author(s)
      河野 昌仙
    • Organizer
      第70回日本物理学会年次大会
    • Place of Presentation
      早稲田大学 早稲田キャンパス
    • Year and Date
      2015-03-24
    • Related Report
      2014 Research-status Report
  • [Presentation] Spectral properties of the two-dimensional Hubbard model with next-nea rest-neighbor hopping near the Mott transition2015

    • Author(s)
      Masanori Kohno
    • Organizer
      APS March Meeting 2015
    • Place of Presentation
      Henry B. Gonzalez Convention Center,San Antonio, Texas, U.S.A
    • Year and Date
      2015-03-03
    • Related Report
      2014 Research-status Report
  • [Presentation] モット転移近傍におけるドーピング誘起状態の直感的説明2014

    • Author(s)
      河野 昌仙
    • Organizer
      日本物理学会2014年秋季大会
    • Place of Presentation
      中部大学 春日井キャンパス
    • Year and Date
      2014-09-10
    • Related Report
      2014 Research-status Report
  • [Presentation] モット転移の本質と高温超伝導体の電子状態2014

    • Author(s)
      河野 昌仙
    • Organizer
      神楽坂・凝縮系理論勉強会
    • Place of Presentation
      東京理科大学 神楽坂キャンパス
    • Year and Date
      2014-06-09
    • Related Report
      2014 Research-status Report
    • Invited
  • [Remarks] 河野昌仙のホームページ

    • URL

      http://www.nims.go.jp/mana/members/personal/m_kohno/Japanese/menu/mhome.htm

    • Related Report
      2016 Annual Research Report 2014 Research-status Report

URL: 

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

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