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Resaerch for Excitonic Insulators

Research Project

Project/Area Number 16K13835
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Condensed matter physics II
Research InstitutionNagoya University

Principal Investigator

Itoh Masayuki  名古屋大学, 理学研究科, 教授 (90176363)

Co-Investigator(Kenkyū-buntansha) 小林 義明  名古屋大学, 理学研究科, 准教授 (60262846)
Project Period (FY) 2016-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords励起子絶縁体 / 励起子凝縮 / 核磁気共鳴 / 核スピン格子緩和率 / 軌道反磁性帯磁率 / スピン帯磁率 / ニッケル化合物 / チタン化合物 / ナイトシフト / 層状物質 / 反磁性軌道帯磁率 / 強相関電子系 / 磁性 / 物性実験 / 低温実験
Outline of Final Research Achievements

An excitonic insulator is a novel insulator driven by the exciton condensation. We have nuclear magnetic resonance (NMR) measurements to probe the exciton condensation. For a candidate of the excitonic insulator Ta2NiSe5, we observed the characteristic temperature dependences of the Se nuclear spin-lattice relaxation rate and the local magnetic susceptibility coming from the exciton condensation. Thus NMR is concluded to be a useful probe to study the excition condensation in excitonic insulators.

Report

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

    (5 results)

All 2018 2017 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (3 results) Remarks (1 results)

  • [Journal Article] Magnetic excitation and local magnetic susceptibility of the excitonic insulator Ta2NiSe5 investigated by 77Se NMR2018

    • Author(s)
      S. Li, S. Kawai, Y. Kobayashi, and M. Itoh
    • Journal Title

      Phys. Rev. B

      Volume: 97 Issue: 16

    • DOI

      10.1103/physrevb.97.165127

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Presentation] 励起子絶縁体候補物質Ta2NiSe5の常圧、高圧の77Se-NMRによる研究2018

    • Author(s)
      河合俊輔, 李尚, 小林義明, 清水康弘, 伊藤正行
    • Organizer
      日本物理学会第73回年次大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 77Se-NMRから見た励起子絶縁体候補物質TiSe2の磁性、局所構造2018

    • Author(s)
      山本裕介, 李尚, 小林義明, 清水康弘, 伊藤正行
    • Organizer
      日本物理学会第73回年次大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 励起子絶縁体候補物質TiSe2の77Se-NMR2017

    • Author(s)
      山本裕介, 小林義明, 清水康弘, 伊藤正行
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Annual Research Report
  • [Remarks] 名古屋大学大学院理学研究科物理学教室固体磁気共鳴研究室

    • URL

      http://i-ken.phys.nagoya-u.ac.jp/index_j.html

    • Related Report
      2017 Annual Research Report 2016 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2019-03-29  

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