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Randomness-Induced Magnetic Order in the System with the Spin-Phonon Interaction

Research Project

Project/Area Number 16K05479
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 InstitutionUniversity of the Ryukyus

Principal Investigator

YASUDA Chitoshi  琉球大学, 理学部, 准教授 (20398564)

Co-Investigator(Kenkyū-buntansha) 秋山 聡  和歌山工業高等専門学校, 総合教育科, 教授 (10256662)
Research Collaborator MIYARA Shouta  
TAIRA Shogo  
SHIMIZU Motoki  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsランダム量子スピン系 / スピンパイエルス / 格子の自由度 / フォノン / 反強磁性長距離秩序 / 量子モンテカルロ法 / 不純物 / 多スピン交換相互作用 / 多スピン交換模型 / 物性理論 / 計算物理 / 磁性
Outline of Final Research Achievements

The antiferromagnetic long-range order is induced by impurity doping in the spin-Peierls compounds in which a nonmagnetic state is realized at low temperatures. In the present work, we investigated the two-dimensional spin-1/2 antiferromagnetic Heisenberg model consisting of one-dimensional chains connected by a weak interchain interaction using the computational physic method. The one-dimensional chain is coupled to lattice degrees of freedom. The theoretical result gave an explanation of the experimental result, which cannot be achieved by previous researches. In addition, we investigated analytically ground and low-excited states of the multiple-spin ring exchange model which is related to an effective model for the spin-Peierls system.

Academic Significance and Societal Importance of the Research Achievements

スピンパイエルス物質における不純物誘起反強磁性長距離秩序の問題は、顕著な量子揺らぎの効果を示す磁性とランダムネスが関連した問題であり、十分な理解が得られていない課題の一つである。本研究の成果により、不純物誘起反強磁性長距離秩序をもつスピンパイエルス物質に誘起する磁気モーメントの位置が明確になり、実験と理論の結果の一致を得た。さらに、どのような物質でどこに磁気モーメントが誘起する可能性があるかを予想しており、今後の研究に新たな広がりをもたらすものとなっている。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (17 results)

All 2019 2018 2017 2016

All Journal Article (7 results) (of which Peer Reviewed: 7 results) Presentation (10 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Spin-Wave Theory for the Scalar Chiral Phase in the Multiple-Spin Exchange Model on a Triangular Lattice2019

    • Author(s)
      Taira Shogo、Yasuda Chitoshi、Momoi Tsutomu、Kubo Kenn
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 88 Issue: 1 Pages: 014701-014701

    • DOI

      10.7566/jpsj.88.014701

    • NAID

      210000135070

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ground-state properties of spin-1/2 Heisenberg antiferromagnets with frustration on the diamond-like-decorated square and triangular lattices2018

    • Author(s)
      Hirose Yuhei, Miura Shoma, Yasuda Chitoshi, and Fukumoto Yoshiyuki
    • Journal Title

      AIP Advances

      Volume: 8 Issue: 10 Pages: 101427-101427

    • DOI

      10.1063/1.5042792

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ground-State Phase Diagram of the Multiple-Spin Exchange Model with Up to the Six-Spin Exchange Interactions on the Triangular Lattice2018

    • Author(s)
      Chitoshi Yasuda, Yuma Uchihira, Shogo Taira, and Kenn Kubo
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 87 Issue: 10 Pages: 104704-104704

    • DOI

      10.7566/jpsj.87.104704

    • NAID

      40021684092

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Antiferromagnetic Long-Range Order for S = 1/2 Two-Dimensional Site-Diluted Heisenberg Model Coupled to Lattice Degree of Freedom2018

    • Author(s)
      Shouta Miyara, and Chitoshi Yasuda
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 87 Issue: 10 Pages: 104702-104702

    • DOI

      10.7566/jpsj.87.104702

    • NAID

      210000134983

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Position of Effective Spins Induced by Dilution in Two-Dimensional Spin-Peierls Systems2018

    • Author(s)
      Chitoshi Yasuda, and Shouta Miyara
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 87 Issue: 1 Pages: 014704-014704

    • DOI

      10.7566/jpsj.87.014704

    • NAID

      40021431890

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Notes on Ground-State Properties of Mixed Spin-1 and Spin-1/2 Lieb-Lattice Heisenberg Antiferromagnets2017

    • Author(s)
      Yuhei Hirose, Shoma Miura, Chitoshi Yasuda, and Yoshiyuki Fukumoto
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 86 Issue: 8 Pages: 083705-083705

    • DOI

      10.7566/jpsj.86.083705

    • NAID

      210000134465

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Crystal Structure and Thermal Properties of Racemic SrC4H4O6 4H2O Single Crystals2017

    • Author(s)
      Takanori Fukami, Seiya Hiyajyo, Shuta Tahara, and Chitoshi Yasuda
    • Journal Title

      International Research Journal of Pure and Applied Chemistry

      Volume: 14 Issue: 2 Pages: 1-10

    • DOI

      10.9734/irjpac/2017/34299

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] 六体交換まで含めた磁場中多スピン交換模型における基底状態相図2018

    • Author(s)
      平良翔吾、安田千寿
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Ground-state properties of spin-1/2 Heisenberg antiferromagnets with frustration on the diamond-like-decorated square and triangular lattices2018

    • Author(s)
      Yuhei Hirose, Shoma Miura, Chitoshi Yasuda, and Yoshiyuki Fukumoto
    • Organizer
      International Conference on Magnetism 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] スピンパイエルス系における希釈誘起磁気モーメントの位置2018

    • Author(s)
      宮良将太、安田千寿
    • Organizer
      日本物理学会第73回年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 六体交換まで含めた三角格子多スピン交換模型のスピン波理論による解析2018

    • Author(s)
      平良翔吾、安田千寿、桃井勉
    • Organizer
      日本物理学会第73回年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 格子の自由度と結合した2次元サイト希釈ハイゼンベルク模型における反強磁性長距離秩序の発現2017

    • Author(s)
      宮良将太、安田千寿
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 擬1次元ボンド交替系におけるネール温度2017

    • Author(s)
      清水元貴、安田千寿
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 次々近接相互作用まで含めた多スピン交換模型における四面体構造の安定性2017

    • Author(s)
      平良翔吾、安田千寿、桃井勉
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] スピン1と1/2のリープ格子ハイゼンベルク反強磁性体の基底状態特性2017

    • Author(s)
      広瀬悠平、三浦将馬、安田千寿、福元好志
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 三角リープ格子及び三角格子上の混合スピン系の基底状態の性質 ー副格子磁化の縮みのスケーリング則についてー2017

    • Author(s)
      三浦将馬、広瀬悠平、安田千寿、福元好志
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 格子の自由度と結合したハイゼンベルク模型におけるランダムネスの効果2016

    • Author(s)
      宮良 翔太、安田 千寿
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      金沢大学角間キャンパス(石川県金沢市角間町)
    • Year and Date
      2016-09-13
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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