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anomalous metal-insulator transition induced by correlated molecule

Research Project

Project/Area Number 18K03532
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
Research InstitutionOsaka Institute of Technology

Principal Investigator

heguri satoshi  大阪工業大学, 工学部, 准教授 (70611648)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords金属絶縁体転移 / 分子性固体 / 強相関電子系 / 超伝導 / 電気輸送特性 / 極端条件下物性 / フラーレン化合物 / 圧力下物性 / 圧力 / 電子相関
Outline of Final Research Achievements

There have been no reports about the electrical transport measurements of fullerides and the discussion has been made on a basis of magnetic measurements. Temperature dependence of electrical resistivity of expanded fcc C603- states carried out under high pressure. The profile of Mott insulating state to superconducting state via normal metallic state was observed. In addition, we revealed that anomalous features strongly coupled with the degree of freedom of C60 molecule.

Academic Significance and Societal Importance of the Research Achievements

モット転移の研究が始まって半世紀以上が経つ現在でも、モット転移やその臨界現象が実験的に調べ議論され始めたのは近年のことである。
本研究では比較的低圧で電子状態を制御可能なバンド幅制御型モット絶縁体である面心立方格子の分子を用いて、銅酸化物でも見られる異常な金属状態の起源と、分子自由度と電子相関が密接に絡み合った系における金属絶縁体転移の性質を実験的に明らかにした。

Report

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

    (6 results)

All 2020 2019 2018

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (4 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Carrier-doped aromatic hydrocarbons: a new platform in condensed matter chemistry and physics2018

    • Author(s)
      satoshi heguri, katsumi tanigaki
    • Journal Title

      dalton transactions

      Volume: 47 Issue: 9 Pages: 2881-2895

    • DOI

      10.1039/c7dt03745g

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 電子ドープされた芳香族分子の基底状態2018

    • Author(s)
      平郡 諭
    • Journal Title

      炭素

      Volume: 284 Pages: 151-163

    • NAID

      130007491839

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] 黒鉛層間化合物の超伝導と磁性2020

    • Author(s)
      平郡諭
    • Organizer
      炭素材料第117委員会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Design of the sodium ionic conductor for all-solid-state battery2020

    • Author(s)
      Kazuyuki Kawahara, Satsohi Heguri
    • Organizer
      APS March Meeting 2020
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Exotic states of carbon based materials2019

    • Author(s)
      平郡 諭
    • Organizer
      炭素材料学会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 芳香族モット絶縁体における物理的圧力効果2018

    • Author(s)
      平郡 諭
    • Organizer
      炭素材料学会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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