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2010 Fiscal Year Final Research Report

Unifying and Geometric Theory for Competing Orders in Low-Dimensional Magnets and Bose Systems

Research Project

  • PDF
Project/Area Number 20540375
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Mathematical physics/Fundamental condensed matter physics
Research InstitutionKyoto University

Principal Investigator

TOTSUKA Keisuke  Kyoto University, 基礎物理学研究所, 准教授 (80291079)

Research Collaborator TANAKA Akihiro  物質材料研究機構, 主幹研究員
LECHEMINANT Philippe  Cergy-Pontoise University, 教授
CAPPONI Sylvain  University of Toulouse, 教授
Project Period (FY) 2008 – 2010
Keywordsフラストレーション / スピン液体 / スピンネマティック / 多体交換相互作用
Research Abstract

An approach based on (bosonic) effective Hamiltonians has been developed in order to understand in a unifying and systematic manner the novel competing phases (vector-chiral, spin-nematic, etc.) in frustrated systems (specifically, quantum magnets with multiple-spin exchange interactions in 1D and 2D). The problem of magnetization plateaus has been revisited from the point of view of topological effects. It has been pointed out that a novel spin-liquid type plateaus with topological order may be realized in high magnetic fields.

  • Research Products

    (8 results)

All 2011 2010 2009 2008

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (4 results)

  • [Journal Article] Effect of Dzyaloshinskii-Moriya interactions on the phase diagram and magnetic excitations of SrCu_2(BO_3)_22011

    • Author(s)
      J.Romhanyi, K.Totsuka, K.Penc
    • Journal Title

      Phys.Rev.B 82

      Pages: 024413

    • Peer Reviewed
  • [Journal Article] Supersolid phase of three-dimensional spin- and hardcore-boson models2010

    • Author(s)
      H.T.Ueda, K.Totsuka
    • Journal Title

      Phys.Rev.B 81

      Pages: 054442

    • Peer Reviewed
  • [Journal Article] Magnon Bose-Einstein condensation and various phases of three-dimensonal quantum helimagnets under high magnetic field2009

    • Author(s)
      H.T.Ueda, K.Totsuka
    • Journal Title

      Phys.Rev.B 80

      Pages: 014417

    • Peer Reviewed
  • [Journal Article] Geometric phases and the magnetization process in quantum antiferromagnets2009

    • Author(s)
      A.Tanaka, K.Totsuka, X.Hu
    • Journal Title

      Phys.Rev.B 79

      Pages: 064412

    • Peer Reviewed
  • [Presentation] Hidden Order and Dynamics of SUSY VBS Models2010

    • Author(s)
      K.Totsuka
    • Organizer
      New Development of Numerical Simulations in Low-Dimensional Quantum Systems(招待講演)
    • Place of Presentation
      Yukawa Institute for Theoretical Physics, Kyoto
    • Year and Date
      2010-10-29
  • [Presentation] A Unifying Approach to Competing Orders in Frustrated Magnets2010

    • Author(s)
      K.Totsuka
    • Organizer
      International Conference on Frustrated Spin Systems, Cold Atoms, Nanomaterials (satellite meeting of StatPhys24)(招待講演)
    • Place of Presentation
      Sheraton Hanoi Hotel, Hanoi, Vietnam
    • Year and Date
      2010-07-15
  • [Presentation] Magnon BEC and Unconventional Quantum Orders2008

    • Author(s)
      K.Totsuka
    • Organizer
      Highly Frustrated Magnetism 2008
    • Place of Presentation
      Technical University Braunschweig, Germany
    • Year and Date
      2008-09-10
  • [Presentation] Geometric Aproachto Magnetization Plateaus2008

    • Author(s)
      K.Totsuka
    • Organizer
      Topological Aspects in Solid State Physics(招待講演)
    • Place of Presentation
      Yukawa Institute for Theoretical Physics, Kyoto
    • Year and Date
      2008-06-27

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Published: 2012-01-26   Modified: 2016-04-21  

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