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強相関電子系のリング交換が引起す新奇な量子凝縮相の理論的・数値的探索

Research Project

Project/Area Number 20029020
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionJapan Atomic Energy Agency

Principal Investigator

坂井 徹  Japan Atomic Energy Agency, 量子ビーム応用研究部門, 研究主幹 (60235116)

Co-Investigator(Kenkyū-buntansha) 野村 清英  九州大学, 理学研究科, 准教授 (70222205)
岡本 清美  東京工業大学, 理工学研究科, 助教 (40152342)
Project Period (FY) 2008 – 2009
Project Status Completed (Fiscal Year 2009)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 2009: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2008: ¥1,100,000 (Direct Cost: ¥1,100,000)
Keywords量子スピン系 / リング交換 / スピンラダー / 磁化プラトー / スーパーソリッド / 強相関電子系 / スピン液体 / スピンギャップ
Research Abstract

正方格子反強磁性体やスピンラダー系における4体交換相互作用としてのリング交換に着目し、これがもたらす新奇な量子現象を、数値的厳密対角化と有限サイズスケーリングにより解析した。その結果、スピンラダー系ではリング交換により、磁化プラトーが生じるだけでなく、磁場誘起非整合秩序が生じ、スーパーソリッド相が実現する可能性があることが示された。
また、強磁性の桁相互作用を持つスピンラダー系IPA-CuCl_3で観測されている2段階のスピンフロップ転移を理論的に説明するために、リング交換によりもたらされるスピンネマティック相が実現する可能性を確認し、リング交換の相互作用定数と磁場による相図を得た。

Report

(2 results)
  • 2009 Annual Research Report
  • 2008 Annual Research Report
  • Research Products

    (48 results)

All 2010 2009 2008 Other

All Journal Article (21 results) (of which Peer Reviewed: 21 results) Presentation (25 results) Remarks (2 results)

  • [Journal Article] Field Induced Exotic Phenomena of the S=1/2 Three-Leg Quantum Spin Nanotube2010

    • Author(s)
      T.Sakai
    • Journal Title

      Journal of Low Temperature Physics 159

      Pages: 55-58

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetization Process of the S=1/2 Distorted Diamond Spin Chain with the Dzyaloshinsky-Moriya interaction2010

    • Author(s)
      T.Sakai
    • Journal Title

      Journal of Physics : Conference Series 200

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Half Magnetization Plateau of Frustrated S=1 Antiferromagnetic Chain2010

    • Author(s)
      T.Tonegawa
    • Journal Title

      Journal of Physics : Conference Series 200

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Field-Induced Nematic Phase in the Spin Ladder System with Easy-Axis Anisotropy2010

    • Author(s)
      T.Sakai
    • Journal Title

      Physica Status Solidi B 247

      Pages: 583-585

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] First-Order Phase Transition between One-Third Magnetization Plateau States in an Anisotropic(S, S')Spin Alternating Chain2010

    • Author(s)
      T.Tonegawa
    • Journal Title

      Physica Status Tolidi 247

      Pages: 688-690

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetization Process of the Kagome Lattice Antiferromagnet2010

    • Author(s)
      H.Nakano
    • Journal Title

      Journal of the Physical Society of Japan 79

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Polarization Plateau in Atomic Fermi Gas Loaded on Triangular Optical Lattice2009

    • Author(s)
      M.Okumura
    • Journal Title

      Physical Review A 79

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dzylashinsky-Moriya Interaction in the S=1/2 Quasi-One-Dimensional Antiferromagnet Cu_2Cl_4・H_8C_4SO_2 as Determined via High-Frequency ESR2009

    • Author(s)
      M.Fujisawa
    • Journal Title

      Physical Review B 80

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic Field versus Temperature Phase Diagram of the Spin-1/2 Alternating-Bond Chain Compound F_5PNN2009

    • Author(s)
      Y.Yoshida
    • Journal Title

      Journal of the Physical Society of Japan 78

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Elementary excitations and spin dynamics in nanowire quantum magnets2009

    • Author(s)
      T.Sakai
    • Journal Title

      International Journal of Modern Physics C 20

      Pages: 1467-1476

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Quantum Phase Transition of a Triangular Lattice Spin Tube and Edge Spin Effects2009

    • Author(s)
      K.Okunishi
    • Journal Title

      International Journal of Modern Physics C 20

      Pages: 1423-1430

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Phase competitions and coexistences in quasi-one-dimensional molecular conductors'exact diagonalization study2009

    • Author(s)
      Y. Otsuka
    • Journal Title

      Physica B: Condensed Matter 404

      Pages: 479-181

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Field-Induced Incommensurate Order and Possible Supersolid in the S=1/2 Frustrated Diamond Chain2009

    • Author(s)
      T. Sakai
    • Journal Title

      Journal of Physics: Conference Series 145

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ground-State Phase Diagram of an (S, S')=(1, 2) Spin-Alternating Chain with Competing Single-Ion Anisotropies2009

    • Author(s)
      T. Tonegawa
    • Journal Title

      Journal of Physics: Conference Series 145

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Two-step quantum spin flop transition in spin ladders2009

    • Author(s)
      T. Sakai
    • Journal Title

      Journal of Physics: Conference Series 150

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Quantum phase transitions of the asymmetric three-lee snin tube2008

    • Author(s)
      T. Sakai
    • Journal Title

      Physical Review B 78

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Possible Mechanism of Charge Stripe Formation Based on the Rine Exchange Interaction2008

    • Author(s)
      T. Sakai
    • Journal Title

      Physica C 468

      Pages: 1163-1165

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Numerical Diagonalization Study on a Phonon-assisted Hole Pairing Menlianism of an Extended t-J Holstein Model2008

    • Author(s)
      T. Sakai
    • Journal Title

      Journal of Physics: Conference Series 108

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Finite-temperature phase diagram of quasi-one-dimensional molecular conductors: Quantum Monte Carlo study2008

    • Author(s)
      Y. Otsuka
    • Journal Title

      Journal of Physical Society of Japan 77

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Mott insulating state in incommensurate molecular conductor2008

    • Author(s)
      H. Seo
    • Journal Title

      Journal of Physics: Conference Series 132

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Critical intermediate phase and phase transitions in atriangular-lattice three-spin interaction model: Level-Spectroscopy approach2008

    • Author(s)
      H. Otsuka
    • Journal Title

      Journal of Physics A 41

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Presentation] スピンチューブの磁化プラトーにおけるスタガード磁化, ダイマー及びカイラル秩序の共存2010

    • Author(s)
      坂井徹
    • Organizer
      日本物理学会第65回年次大会
    • Place of Presentation
      岡山
    • Year and Date
      2010-03-21
    • Related Report
      2009 Annual Research Report
  • [Presentation] Field-induced quantum phase transitions of the asymmetric three-leg spin tube2010

    • Author(s)
      坂井徹
    • Organizer
      American Physical Society March Meeting
    • Place of Presentation
      Portland
    • Year and Date
      2010-03-16
    • Related Report
      2009 Annual Research Report
  • [Presentation] スピンナノチューブのカイラリティ2010

    • Author(s)
      坂井徹
    • Organizer
      CMRC研究会「相関電子と構造物性」
    • Place of Presentation
      筑波
    • Year and Date
      2010-02-22
    • Related Report
      2009 Annual Research Report
  • [Presentation] カゴメ格子反強磁性体の磁気ダイナミクス2010

    • Author(s)
      坂井徹
    • Organizer
      古典及び量子系のダイナミクス・非平衡統計力学に関するワークショップ
    • Place of Presentation
      東京
    • Year and Date
      2010-02-14
    • Related Report
      2009 Annual Research Report
  • [Presentation] カゴメ格子反強磁性体の磁化過程2009

    • Author(s)
      坂井徹
    • Organizer
      東大物性研短期研究会「計算物理学」
    • Place of Presentation
      柏
    • Year and Date
      2009-12-10
    • Related Report
      2009 Annual Research Report
  • [Presentation] Magnetization process of the S=1/2 distorted diamond spin chain2009

    • Author(s)
      坂井徹
    • Organizer
      International Symposium : High Magnetic Field Spin Science in 100T
    • Place of Presentation
      Sendai
    • Year and Date
      2009-12-08
    • Related Report
      2009 Annual Research Report
  • [Presentation] Selection Rules for ESR Direct Transition of the Spin Gap and their Applications2009

    • Author(s)
      坂井徹
    • Organizer
      Electron Magnetic Resonance of Strongly Correlated Spin Systems
    • Place of Presentation
      Kobe
    • Year and Date
      2009-11-09
    • Related Report
      2009 Annual Research Report
  • [Presentation] Quantum Phase Transition of the 3-Leg Spin Tube2009

    • Author(s)
      坂井徹
    • Organizer
      International Workshop on Dynamics and Manipulation of Quantum Systems
    • Place of Presentation
      Tokyo
    • Year and Date
      2009-10-14
    • Related Report
      2009 Annual Research Report
  • [Presentation] ジャロシンスキー・守谷相互作用のある歪んだダイヤモンド鎖の磁化過程2009

    • Author(s)
      坂井徹
    • Organizer
      日本物理学会秋季大会
    • Place of Presentation
      熊本
    • Year and Date
      2009-09-26
    • Related Report
      2009 Annual Research Report
  • [Presentation] 三本鎖スピンチューブの3分の1磁化プラトー2009

    • Author(s)
      坂井徹
    • Organizer
      日本物理学会秋季大会
    • Place of Presentation
      熊本
    • Year and Date
      2009-09-26
    • Related Report
      2009 Annual Research Report
  • [Presentation] 異方的スピンラダー系の磁場誘起スピンネマティック相2009

    • Author(s)
      坂井徹
    • Organizer
      日本物理学会秋季大会
    • Place of Presentation
      熊本
    • Year and Date
      2009-09-25
    • Related Report
      2009 Annual Research Report
  • [Presentation] Magnetic field induced phenomena in quasi-one-dimensional organic magnets2009

    • Author(s)
      坂井徹
    • Organizer
      International Workshop on "Theories on Strongly Correlated Molecular Conductors"
    • Place of Presentation
      Narita
    • Year and Date
      2009-09-18
    • Related Report
      2009 Annual Research Report
  • [Presentation] Numerical Exact Diagonalization Study on a Phonon-Assisted Hole Paring in the High-Tc Cuprates2009

    • Author(s)
      坂井徹
    • Organizer
      International Conference on Materials and Mechanisms of Superconductivity
    • Place of Presentation
      Tokyo
    • Year and Date
      2009-09-08
    • Related Report
      2009 Annual Research Report
  • [Presentation] Field-Induced Nematic Phase in the Spin Ladder System with Easy-Axis Anisotropy2009

    • Author(s)
      坂井徹
    • Organizer
      International Conference on Quantum Criticality and Novel Phases
    • Place of Presentation
      Dresden
    • Year and Date
      2009-08-03
    • Related Report
      2009 Annual Research Report
  • [Presentation] Magnetization Process of the S=1/2 Distorted Diamond Spin Chain with the Dzyaloshinsky-Moriya interaction2009

    • Author(s)
      坂井徹
    • Organizer
      International Conference on Magnetism(ICM)
    • Place of Presentation
      Karlsruhe
    • Year and Date
      2009-07-30
    • Related Report
      2009 Annual Research Report
  • [Presentation] Field Induced Exotic Phenomena of the S=1/2 Three-Leg Quantum Spin Nanotube2009

    • Author(s)
      坂井徹
    • Organizer
      International Symposium on Research in High Magnetic Field
    • Place of Presentation
      Dresden
    • Year and Date
      2009-07-23
    • Related Report
      2009 Annual Research Report
  • [Presentation] Quantum Phase Transitions of the Three-Leg Spin Tube2009

    • Author(s)
      坂井徹
    • Organizer
      oint European Japanese Conference : Frustration in Condensed Matter
    • Place of Presentation
      Lyon
    • Year and Date
      2009-05-13
    • Related Report
      2009 Annual Research Report
  • [Presentation] スピンナノチューブ:最近の理論的発展2009

    • Author(s)
      坂井徹
    • Organizer
      日本物理学会、領域3,8,11合同シンポジウム
    • Place of Presentation
      東京
    • Year and Date
      2009-03-28
    • Related Report
      2008 Annual Research Report
  • [Presentation] Quantum Phase Transition of the Asymmetric Spin Tube2009

    • Author(s)
      T. Sakai
    • Organizer
      American Physical Sosiety March Meeting
    • Place of Presentation
      Pittsburgh
    • Year and Date
      2009-03-16
    • Related Report
      2008 Annual Research Report
  • [Presentation] Field-induced quantum phase transitions in low-dimensional spin systems2009

    • Author(s)
      T. Sakai
    • Organizer
      JAEA Synchrotron Radiation Research Symposium
    • Place of Presentation
      SPring-8
    • Year and Date
      2009-03-07
    • Related Report
      2008 Annual Research Report
  • [Presentation] Quantum Phase Transition in the Spin Nanotube2009

    • Author(s)
      T. Sakai
    • Organizer
      Supercomputing in Solid State Physics
    • Place of Presentation
      柏
    • Year and Date
      2009-02-17
    • Related Report
      2008 Annual Research Report
  • [Presentation] Ring Exchange Induced Magnetic Phenomena in Spin Ladder Systems2009

    • Author(s)
      T. Sakai
    • Organizer
      International Workshop on Quantum Critical Phenomena and Novel Phases in Super clean Materials
    • Place of Presentation
      Honolulu (USA)
    • Year and Date
      2009-01-13
    • Related Report
      2008 Annual Research Report
  • [Presentation] Elementary Excitations and Dynamics of Nanowire Magnets2008

    • Author(s)
      T. Sakai
    • Organizer
      Dynamics and Manipulation of Quantum Systems
    • Place of Presentation
      東京
    • Year and Date
      2008-10-22
    • Related Report
      2008 Annual Research Report
  • [Presentation] Topics of Low-Dimensional Quantum Spin Systems2008

    • Author(s)
      T. Sakai
    • Organizer
      57th Fujihara Seminar
    • Place of Presentation
      苫小牧
    • Year and Date
      2008-07-26
    • Related Report
      2008 Annual Research Report
  • [Presentation] 歪んだダイヤモンド鎖の磁場誘起非整合秩序2008

    • Author(s)
      坂井徹
    • Organizer
      日本物理学会
    • Place of Presentation
      東京
    • Year and Date
      2008-03-27
    • Related Report
      2008 Annual Research Report
  • [Remarks]

    • URL

      http://cmt.spring8.or.jp/

    • Related Report
      2009 Annual Research Report
  • [Remarks]

    • URL

      http://www.jaea.spring8.or.jp/cmt/

    • Related Report
      2008 Annual Research Report

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Published: 2008-04-01   Modified: 2018-03-28  

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