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Magnetism and superconductivity induced by holes introduced to Mott insulator

Research Project

Project/Area Number 26400411
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Mathematical physics/Fundamental condensed matter physics
Research InstitutionToyota Technological Institute

Principal Investigator

Takano Ken'ichi  豊田工業大学, 工学(系)研究科(研究院), 教授 (00197112)

Co-Investigator(Kenkyū-buntansha) 佐野 和博  三重大学, 工学研究科, 教授 (40201537)
Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2016: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2015: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000)
Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordsモット絶縁体 / ホールとスピンの束縛状態 / t-Jモデル / ホール・スピン束縛状態 / t-J模型 / 長岡強磁性 / ホールの運動 / 強相関 / 量子リング
Outline of Final Research Achievements

We investigated the motion of holes which are introduced in Mott insulator by doping. Such a hole moves in the surrounding electrons, strongly interacting with the electronic spins. By numerical analysis, we confirmed that one hole and spins form a bound state which behaves as a composite particle with spin S=1, 2, 3, ... . The spin magnitude of a composite particle depends on the values of parameters in the Hamiltonian. Two S=1 composite particles exist almost independently. Two composite particles with S more than 1 aggregate to a single ferromagnetic area. We further constructed the phase diagram for finite hole density by numerical calculation.

Report

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

    (6 results)

All 2017 2016 2015 2014

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Acknowledgement Compliant: 2 results,  Open Access: 1 results) Presentation (4 results)

  • [Journal Article] Ground-State Phase Diagram of S = 1 Diamond Chains2017

    • Author(s)
      Kazuo Hida, Ken'ichi Takano
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 86 Issue: 3 Pages: 0337071-4

    • DOI

      10.7566/jpsj.86.033707

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Ferromagnetic Clouds Caused by Hole Motion in a One-Dimensional t-J Model2016

    • Author(s)
      Kazuhiro Sano, Ken'ichi Takano
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 85 Issue: 9 Pages: 094714-094714

    • DOI

      10.7566/jpsj.85.094714

    • NAID

      40020934758

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] 混合スピンダイヤモンド鎖の理論2017

    • Author(s)
      飛田和男,高野健一,鈴木秀則
    • Organizer
      日本物理学会第72回年次大会
    • Place of Presentation
      大阪大学豊中キャンパス(大阪府豊中市)
    • Year and Date
      2017-03-18
    • Related Report
      2016 Annual Research Report
  • [Presentation] 1次元t-Jモデルにおけるホールの運動と電子状態III2017

    • Author(s)
      佐野和博,高野健一
    • Organizer
      日本物理学会第72回年次大会
    • Place of Presentation
      大阪大学豊中キャンパス(大阪府豊中市)
    • Year and Date
      2017-03-17
    • Related Report
      2016 Annual Research Report
  • [Presentation] 量子リング中の2電子スピン状態の磁場増加に伴うシングレット-トリプレット振動2015

    • Author(s)
      法月直人,高野健一
    • Organizer
      日本物理学会第70回年次大会
    • Place of Presentation
      早稲田大学早稲田キャンパス
    • Year and Date
      2015-03-22
    • Related Report
      2014 Research-status Report
  • [Presentation] t1-t2-J1-J2 モデルにおけるホールの運動と電子 状態 Ⅱ2014

    • Author(s)
      佐野和博,高野健一
    • 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
      2014-09-09
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2018-03-22  

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