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Experimental study of magnetic properties of multi-layered Dirac fermion system

Research Project

Project/Area Number 17K05557
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Condensed matter physics II
Research InstitutionNational Institute for Materials Science

Principal Investigator

KONOIKE Takako  国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, 主任研究員 (70447316)

Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords有機伝導体 / ディラック電子 / 軌道反磁性 / 有機導体 / 反磁性 / 磁化率 / 分子性固体 / 強相関電子系 / 物性実験 / 磁気物性
Outline of Final Research Achievements

In this study, we measured the magnetic susceptibility under pressure of bulk organic conductor alpha-(BEDT-TTF)2I3, which is known to have a linear dispersion similar to that of graphene under pressure. The purpose is to experimentally clarify the giant orbital diamagnetism due to the inter-band effect of magnetic field that is peculiar to the Dirac electron system. Although clear diamagnetism could be observed for the first time in the target material by this study, the possibility of structural transition due to aging cannot be ruled out, and further studies are needed to determine the origin of the observed diamagnetism.

Academic Significance and Societal Importance of the Research Achievements

2010年にノーベル賞を受賞したグラフェンは高いキャリヤ移動度等の優れた性質を持つが,これらの性質はグラフェンにおいて質量ゼロの相対論的ディラック電子系が形成されていることに起因する.ディラック電子を利用した次世代の超高速・低消費電力デバイス開拓には,基礎物性の解明が必須となるが,グラフェンは極微細な結晶で実験的研究が難しい.そこで本研究ではバルク結晶として初めてゼロギャップディラック電子系を実現した有機導体の実験的研究を行っている.従来の固体物理の枠組みを超えたディラック電子物性の研究は学術的意義が高いとともに,ディラック電子系材料の実用化に必要不可欠であり社会への貢献にも繋がる.

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (18 results)

All 2021 2020 2019 2018 2017 Other

All Presentation (13 results) (of which Int'l Joint Research: 3 results) Remarks (5 results)

  • [Presentation] alpha-(BEDT-TTF)2I3の圧力下磁化率測定結果の解釈2021

    • Author(s)
      鴻池貴子
    • Organizer
      日本物理学会2021年年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 有機ディラック電子系の磁気物性2021

    • Author(s)
      鴻池貴子
    • Organizer
      MANA International Symposium 2021
    • Related Report
      2020 Annual Research Report
  • [Presentation] 有機ディラック電子系alpha-(BEDT-TTF)2I3の圧力下磁化率と抵抗測定2020

    • Author(s)
      鴻池貴子
    • Organizer
      日本物理学会2019年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 有機ディラック系物質における軌道反磁性の観測2020

    • Author(s)
      鴻池貴子
    • Organizer
      有機ディラック電子系におけるトポロジカル現象と新奇物性開拓
    • Related Report
      2020 Annual Research Report
  • [Presentation] 有機ディラック電子系alpha-(BEDT-TTF)2I3の圧力下磁化率測定2019

    • Author(s)
      鴻池貴子
    • Organizer
      日本物理学会2019年年次大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 有機ディラック電子系alpha-(BEDT-TTF)2I3の圧力下磁化率と抵抗測定2019

    • Author(s)
      鴻池貴子
    • Organizer
      日本物理学会2019年秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Giant Diamagnetism observed in Organic Dirac Electron System2019

    • Author(s)
      Takako Konoike
    • Organizer
      ISCOM2019
    • Related Report
      2019 Research-status Report
  • [Presentation] Magnetic susceptibility of Organic Dirac Fermion System2019

    • Author(s)
      鴻池 貴子,寺嶋 太一,杉浦 栞理,廣瀬 陽代,菊川 直樹,宇治 進也
    • Organizer
      MANA International Symposium 2019
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 有機ディラック電子系alpha-(BEDT-TTF)2I3の圧力下磁化率測定2019

    • Author(s)
      鴻池 貴子,寺嶋 太一,杉浦 栞理,廣瀬 陽代,菊川 直樹,宇治 進也
    • Organizer
      日本物理学会2019年年次大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 有機ディラック電子系alpha-(BEDT-TTF)2I3の圧力下磁化率2018

    • Author(s)
      鴻池 貴子,寺嶋 太一,杉浦 栞理,廣瀬 陽代,宇治 進也
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Magnetic Property of Organic Fermion System2018

    • Author(s)
      鴻池貴子,寺嶋太一,宇治進也
    • Organizer
      MANA International Symposium 2018
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 有機ディラック電子系の圧力下磁化率測定2017

    • Author(s)
      鴻池貴子,寺嶋太一,菊川直樹,杉浦栞理,廣瀬陽代,宇治進也
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Magnetic Susceptibility in Organic Fermion System2017

    • Author(s)
      鴻池貴子,寺嶋太一,宇治進也
    • Organizer
      ISCOM2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Remarks] SAMURAI

    • URL

      https://samurai.nims.go.jp/profiles/konoike_takako?locale=ja

    • Related Report
      2020 Annual Research Report
  • [Remarks] SAMURAI NIMS Researchers Directory Service

    • URL

      https://samurai.nims.go.jp/profiles/konoike_takako/publications?locale=en

    • Related Report
      2019 Research-status Report
  • [Remarks] SAMURAI NIMS Researchers Directory Service

    • URL

      https://samurai.nims.go.jp/profiles/konoike_takako?locale=ja

    • Related Report
      2018 Research-status Report
  • [Remarks] MANA Research Digest 2017

    • URL

      http://www.nims.go.jp/mana/jp/pror/periodical/n28red0000003ohn-att/MANA_Research_Digest_2017.pdf

    • Related Report
      2017 Research-status Report
  • [Remarks] 研究者総覧SAMURAI

    • URL

      https://samurai.nims.go.jp/profiles/KONOIKE_Takako?locale=ja

    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2022-01-27  

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