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Study of Electron Correlation Effect in Half-metallic Ferromagnets

Research Project

Project/Area Number 24540343
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Condensed matter physics II
Research InstitutionInternational Christian University

Principal Investigator

HIRASHIMA Dai  国際基督教大学, 教養学部, 教授 (20208820)

Co-Investigator(Kenkyū-buntansha) MUTOU Tetsuya  島根大学, 総合理工学研究科, 准教授 (50312244)
Project Period (FY) 2012-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
KeywordsHalf-metallic ferro. / Electron correlation / Depolarization / Surface state / Flat band / ハーフメタル強磁性 / 遍歴磁性 / 電子相関 / 界面状態 / 遍歴強磁性 / 保存型近似 / スピン波 / 金属強磁性 / ハーフメタル
Outline of Final Research Achievements

Electron correlation effect on half-metallic ferromagnetic compounds is clarified using perturbational methods. In particular, the self-consistent T-matrix theory is applied to NiMnSb, which is a typical half-metallic compound, and it is found that the depolarization around the Fermi surface is mainly caused by the chemical potential shift. In addition, the mechanism of generation of peculiar edge/surface states such as the ones found on a zigzag edge of graphene is discussed and many examples where this kind of peculiar edge/surface states are generated are found.

Report

(5 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • 2012 Research-status Report
  • Research Products

    (15 results)

All 2016 2015 2014 2013 2012 Other

All Int'l Joint Research (1 results) Journal Article (10 results) (of which Peer Reviewed: 10 results) Presentation (3 results) Remarks (1 results)

  • [Int'l Joint Research] マックスプランク研究所(ドレスデン)(ドイツ)

    • Related Report
      2015 Annual Research Report
  • [Journal Article] Completely Flat Band in a Crystal of Finite Thickness2016

    • Author(s)
      Dai S. Hirashima
    • Journal Title

      Jounal of the Physical Society of Japan

      Volume: 85 Issue: 4 Pages: 044705-044705

    • DOI

      10.7566/jpsj.85.044705

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Finite Temperature Properties of the Half-Metallic Compound NiMnSb: A Self-Consistent T-Matrix Theory2015

    • Author(s)
      Dai S. Hirashima
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 84 Issue: 12 Pages: 124707-124707

    • DOI

      10.7566/jpsj.84.124707

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Gas-Solid Transititon of Quantum Particles Interacting with Inverse-Power-Law Repulsive Potential2014

    • Author(s)
      K. Yamashita, Y. Kwon, Y. Koike, and D. S. Hirashima
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 83 Issue: 4 Pages: 043602-043602

    • DOI

      10.7566/jpsj.83.043602

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Journal Article] Crossover from a Low-Temperature Heavy-Quasiparticle State to a High-Temperature Local-Moment State in the Heavy Fernion System2014

    • Author(s)
      E. Nagira, S. Fujita, and T. Mutou
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 83 Issue: 12 Pages: 124710-124710

    • DOI

      10.7566/jpsj.83.124710

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Journal Article] Correlation Effect in bcc Iron at Finite Temperatures2013

    • Author(s)
      M. Nishishita, D. Hirashima, and S. Pandey
    • Journal Title

      Journal of the Korean Physical Society

      Volume: 62 Pages: 2160-2163

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Dynamical density and spin response functions of two-dimensional correlated fermion systems: Self-consistent second-order perturbation theory2013

    • Author(s)
      A. Kotani and D. S. Hirashima
    • Journal Title

      Physical Review B

      Volume: 88 Issue: 1

    • DOI

      10.1103/physrevb.88.014529

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Validity of Fermi-Liquid Description of Low-Energy Magnetic Excitations in Electron Doped Cuprate Superconductors2013

    • Author(s)
      T. Mutou and D. S. Hirashima
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 82 Issue: 9 Pages: 094703-094703

    • DOI

      10.7566/jpsj.82.094703

    • NAID

      40019788636

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Self-consistent Second-order Perturbartion Theory of Correlation Effect in bcc Iron at Finite Temperatures2013

    • Author(s)
      M. Nishishita, D. S. Hirashima, and S. Pandey
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 82 Issue: 11 Pages: 114705-114705

    • DOI

      10.7566/jpsj.82.114705

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Spin Hall effect in iron-based superconductors: A Dirac point effect2012

    • Author(s)
      S. Pandey, H. Kontani, D. S. Hirashima, R. Arita, and H. Aoki
    • Journal Title

      Physical Review B

      Volume: 86

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Journal Article] Density fluctuation spectrum of two-dimensional correlated fermion systems2012

    • Author(s)
      A. Kotani and D. Hirashima
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 400 Pages: 12035-12035

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Presentation] Gas-Solid Phase Transition in Hardcore-like Systems2013

    • Author(s)
      K. Yamashita, Y. Kwon and D. Hirashima
    • Organizer
      International Symposium on Quantum Fluids and Solids
    • Place of Presentation
      Matsue, Japan
    • Related Report
      2013 Research-status Report
  • [Presentation] 有限温度におけるソフトコア粒子系の固体・気体相転移II2013

    • Author(s)
      山下耕平、Yongkyung Kwon, 平島大
    • Organizer
      日本物理学会2013年秋季大会
    • Place of Presentation
      徳島大学
    • Related Report
      2013 Research-status Report
  • [Presentation] Correlation effect in iron at finite temperatures2012

    • Author(s)
      M. Nishishita, D. Hirashima, and S. Pandey
    • Organizer
      The 19th International Conference on Magnetism
    • Place of Presentation
      Busan, Korea
    • Related Report
      2012 Research-status Report
  • [Remarks] 国際基督教大学 研究者情報データベース

    • URL

      http://researchers.icu.ac.jp/Profiles/10/0000981/profile.html

    • Related Report
      2015 Annual Research Report

URL: 

Published: 2013-05-31   Modified: 2020-05-15  

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