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High-field quantum phenomena of organic solids investigated by presice measurements in pulsed fields

Research Project

Project/Area Number 20K14406
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
Research InstitutionThe University of Tokyo

Principal Investigator

Imajo Shusaku  東京大学, 物性研究所, 特任助教 (30825352)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywordsパルス強磁場 / 有機伝導体 / 装置開発 / 強磁場 / 有機超伝導体 / FFLO / 熱測定
Outline of Research at the Start

本研究はパルス強磁場中で可能な物性測定手法の拡張を行い、測定上の難点から強磁場
領域の研究が少ない有機伝導体の新奇量子状態の探索と評価を行うことを目標としている。「磁場」は電子に直接作用する重要な外場であるが、強磁場発生には材料・技術的な問題が存在し、一部の物性研究には磁場強度が足りない場合がある。パルス電磁石によって強磁場発生が可能であるが、 短い発生時間やノイズの問題から測定可能な物理量や試料は限られてきた。本研究ではパルス磁場中測定環境の整備により、FFLO超伝導状態や量子スピン液体などの有機固体が強磁場中で示す多様な量子物性の詳細を議論する。

Outline of Final Research Achievements

In this study, we focused on extending the method of precise physical property measurements in pulsed high magnetic fields, aiming to investigate novel quantum states in organic conductors, which have not been widely studied in high magnetic fields due to the measurement difficulties.
Although pulsed magnets can generate high magnetic fields, some disadvantages, such as short pulse duration and large noises, make it necessary to use different methods from that used for usual physical property measurements. Here, we developed and improved measurement systems for pulsed-field measurements, which enables multiple measurements in a pulsed magnetic field, such as heat capacity and ultrasonic measurements of organic conductors. By using this systems, we succeeded in studying various high-field quantum properties occurred in organic solids, including the FFLO superconducting state.

Academic Significance and Societal Importance of the Research Achievements

パルス強磁場中の物性測定は定常磁場中の測定に比べて実験的難度が非常に高く、研究対象は測定上扱いやすい物質が選ばれやすい。本研究では測定難度の高い有機固体に対してパルス強磁場中精密物性測定を行うために、パルス磁場中測定手法の拡張を中心に研究を行い、実際に複数の有機固体のパルス強磁場測定を成功させた。
有機物の単結晶のように微小・脆弱な固体でもパルス磁場中で精密測定が比較的容易になったことは、これまで未踏であったパルス強磁場研究の裾野を広げるだけでなく、従来の研究の測定精度や効率を上げることにも繋がり、強磁場固体物性研究を押し上げる学術的・社会的意義がある。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (42 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (10 results) Journal Article (20 results) (of which Int'l Joint Research: 9 results,  Peer Reviewed: 20 results,  Open Access: 9 results) Presentation (12 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [Int'l Joint Research] Nottingham Trent University(英国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] CEA-Grenoble(フランス)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] TU Wien(オーストリア)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Goethe-University Frankfurt(ドイツ)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Los Alamos National Laboratory(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] CEA-Grenoble(フランス)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Nottingham Trent University(英国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Goethe University(ドイツ)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] CEA-Grenoble(フランス)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Nottingham Trent University(英国)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Quantum oscillations in the centrosymmetric skyrmion-hosting magnet GdRu2Si22023

    • Author(s)
      N. Matsuyama, T. Nomura, S. Imajo, T. Nomoto, R. Arita, K. Sudo, M. Kimata, N. D. Khanh, R. Takagi, Y. Tokura, S. Seki, K. Kindo, Y. Kohama
    • Journal Title

      Physical Review B

      Volume: 107 Issue: 10 Pages: 104421-104421

    • DOI

      10.1103/physrevb.107.104421

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Enhanced Superconducting Pairing Strength near a Pure Nematic Quantum Critical Point2023

    • Author(s)
      Mukasa Kiyotaka、Ishida Kousuke、Imajo Shusaku、Qiu Mingwei、Saito Mikihiko、Matsuura Kohei、Sugimura Yuichi、Liu Supeng、Uezono Yu、Otsuka Takumi、Culo Matija、Kasahara Shigeru、Matsua Yuji、Hussey Nigel E.、Watanabe Takao、Kindo Koichi、Shibauchi Takasada
    • Journal Title

      Physical Review X

      Volume: 13 Issue: 1 Pages: 011032-011032

    • DOI

      10.1103/physrevx.13.011032

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Correlation-driven organic 3D topological insulator with relativistic fermions2023

    • Author(s)
      Nomoto Tetsuya、Imajo Shusaku、Akutsu Hiroki、Nakazawa Yasuhiro、Kohama Yoshimitsu
    • Journal Title

      Nature Communications

      Volume: 14 Issue: 1 Pages: 2130-2130

    • DOI

      10.1038/s41467-023-37293-3

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Thermodynamic properties of the Mott insulator-metal transition in a triangular lattice system without magnetic order2023

    • Author(s)
      Emre Yesil, Shusaku Imajo, Satoshi Yamashita, Hiroki Akutsu, Yohei Saito, Andrej Pustogow, Atsushi Kawamoto, and Yasuhiro Nakazawa
    • Journal Title

      Phys. Rev. B

      Volume: 107 Issue: 4 Pages: 0451331-9

    • DOI

      10.1103/physrevb.107.045133

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Magnetically Hidden State on the Ground Floor of the Magnetic Devil’s Staircase2022

    • Author(s)
      Imajo S.、Matsuyama N.、Nomura T.、Kihara T.、Nakamura S.、Marcenat C.、Klein T.、Seyfarth G.、Zhong C.、Kageyama H.、Kindo K.、Momoi T.、Kohama Y.
    • Journal Title

      Physical Review Letters

      Volume: 129 Issue: 14 Pages: 147201-147201

    • DOI

      10.1103/physrevlett.129.147201

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Emergent anisotropy in the Fulde-Ferrell-Larkin-Ovchinnikov state2022

    • Author(s)
      Imajo Shusaku、Nomura Toshihiro、Kohama Yoshimitsu、Kindo Koichi
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 5590-5590

    • DOI

      10.1038/s41467-022-33354-1

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Superconductivity and Charge Ordering in BEDT-TTF Based Organic Conductors with β″-Type Molecular Arrangement2022

    • Author(s)
      Ihara Yoshihiko、Imajo Shusaku
    • Journal Title

      Crystals

      Volume: 12 Issue: 5 Pages: 711-711

    • DOI

      10.3390/cryst12050711

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Novel quantum phase of the chromium spinel oxide HgCr2O4 in high magnetic fields2022

    • Author(s)
      S. Kimura, S. Imajo, M. Gen, T. Momoi, M. Hagiwara, H. Ueda, and Y. Kohama
    • Journal Title

      Physical Review B

      Volume: 105 Issue: 18

    • DOI

      10.1103/physrevb.105.l180405

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Electronic Heat Capacity and Lattice Softening of Partially Deuterated Compounds of κ-(BEDT-TTF)2Cu[N(CN)2]Br2022

    • Author(s)
      Y. Matsumura, S. Imajo, S. Yamashita, H. Akutsu, and Y. Nakazawa
    • Journal Title

      Crystals

      Volume: 12 Issue: 1 Pages: 21-12

    • DOI

      10.3390/cryst12010002

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Persistence of fermionic spin excitations through a genuine Mott transition in κ-type organics2022

    • Author(s)
      Imajo S.、Kato N.、Marckwardt R. J.、Yesil E.、Akutsu H.、Nakazawa Y.
    • Journal Title

      Physical Review B

      Volume: 105 Issue: 12 Pages: 125130-125130

    • DOI

      10.1103/physrevb.105.125130

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Revealing three-dimensional quantum criticality by Sr substitution in Han purple2021

    • Author(s)
      Allenspach Stephan、Puphal Pascal、Link Joosep、Heinmaa Ivo、Pomjakushina Ekaterina、Krellner Cornelius、Lass Jakob、Tucker Gregory S.、Niedermayer Christof、Imajo Shusaku、Kohama Yoshimitsu、et al.,
    • Journal Title

      Physical Review Research

      Volume: 3 Issue: 2 Pages: 023177-023177

    • DOI

      10.1103/physrevresearch.3.023177

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Quantum transport of topological spin solitons in a one-dimensional organic ferroelectric2021

    • Author(s)
      Imajo S.、Miyake A.、Kurihara R.、Tokunaga M.、Kindo K.、Horiuchi S.、Kagawa F.
    • Journal Title

      Physical Review B

      Volume: 103 Issue: 20

    • DOI

      10.1103/physrevb.103.l201117

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Thermodynamic evidence for the formation of a Fulde-Ferrell-Larkin-Ovchinnikov phase in the organic superconductor λ-(BETS)2GaCl42021

    • Author(s)
      Imajo S.、Kobayashi T.、Kawamoto A.、Kindo K.、Nakazawa Y.
    • Journal Title

      Physical Review B

      Volume: 103 Issue: 22

    • DOI

      10.1103/physrevb.103.l220501

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Normal state specific heat in the cuprate superconductors La2-xSrxCuO4 and Bi2+ySr2-x-yLaxCuO6+delta near the critical point of the pseudogap phase2021

    • Author(s)
      Girod C.、LeBoeuf D.、Demuer A.、Seyfarth G.、Imajo S.、Kindo K.、Kohama Y.、Lizaire M.、Legros A.、Gourgout A.、Takagi H.、Kurosawa T.、Oda M.、Momono N.、Chang J.、Ono S.、Zheng G.-q.、Marcenat C.、Taillefer L.、Klein T.
    • Journal Title

      Physical Review B

      Volume: 103 Issue: 21 Pages: 214506-214506

    • DOI

      10.1103/physrevb.103.214506

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Extraordinary π-electron superconductivity emerging from a quantum spin liquid2021

    • Author(s)
      Imajo S.、Sugiura S.、Akutsu H.、Kohama Y.、Isono T.、Terashima T.、Kindo K.、Uji S.、Nakazawa Y.
    • Journal Title

      Physical Review Research

      Volume: 3 Issue: 3 Pages: 0330261-9

    • DOI

      10.1103/physrevresearch.3.033026

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The FFLO State in the Dimer Mott Organic Superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br2021

    • Author(s)
      Imajo Shusaku、Kindo Koichi
    • Journal Title

      Crystals

      Volume: 11 Issue: 11 Pages: 1358-1358

    • DOI

      10.3390/cryst11111358

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] First Molecular Superconductor with the Tris(Oxalato)Aluminate Anion, β″-(BEDT-TTF)4(H3O)Al(C2O4)3・C6H5Br, and Isostructural Tris(Oxalato)Cobaltate and Tris(Oxalato)Ruthenate Radical Cation Salts2021

    • Author(s)
      Blundell Toby James、Brannan Michael、Mburu-Newman Joey、Akutsu Hiroki、Nakazawa Yasuhiro、Imajo Shusaku、Martin Lee
    • Journal Title

      Magnetochemistry

      Volume: 7 Issue: 7 Pages: 90-90

    • DOI

      10.3390/magnetochemistry7070090

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] High-resolution calorimetry in pulsed magnetic fields2021

    • Author(s)
      Imajo Shusaku、Dong Chao、Matsuo Akira、Kindo Koichi、Kohama Yoshimitsu
    • Journal Title

      Review of Scientific Instruments

      Volume: 92 Issue: 4 Pages: 043901-043901

    • DOI

      10.1063/5.0040655

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Symmetry change of d-wave superconductivity in κ-type organic superconductors2021

    • Author(s)
      Imajo S.、Kindo K.、Nakazawa Y.
    • Journal Title

      Physical Review B

      Volume: 103 Issue: 6

    • DOI

      10.1103/physrevb.103.l060508

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Anisotropic Fully Gapped Superconductivity Possibly Mediated by Charge Fluctuations in a Nondimeric Organic Complex2020

    • Author(s)
      Imajo S.、Akutsu H.、Kurihara R.、Yajima T.、Kohama Y.、Tokunaga M.、Kindo K.、Nakazawa Y.
    • Journal Title

      Physical Review Letters

      Volume: 125 Issue: 17 Pages: 177002-177002

    • DOI

      10.1103/physrevlett.125.177002

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] 超音波で観るFFLO超伝導の空間異方性2023

    • Author(s)
      今城周作
    • Organizer
      日本物理学会2023年春季大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 強相関有機超伝導体の BCS-BECクロスオーバー領域における擬ギャップ2023

    • Author(s)
      今城周作、小林拓矢、松村祐希、中澤康浩、谷口弘三、金道浩一
    • Organizer
      日本物理学会2023年春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] パルス強磁場を活用した分子性導体の研究2022

    • Author(s)
      今城周作
    • Organizer
      強磁場コラボラトリー オンラインセミナー
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Acoustic response of the Fulde-Ferrell-Larkin-Ovchinnikov state2022

    • Author(s)
      Shusaku Imajo, T. Nomura, Y. Kohama, and K. Kindo
    • Organizer
      29th International Conference on Low Temperature Physics
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Acoustic properties of the Fulde-Ferrell-Larkin-Ovchinnikov state2022

    • Author(s)
      Shusaku Imajo, T. Nomura, Y. Kohama, and K. Kindo
    • Organizer
      ISCOM2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 配位高分子(d8-DMe-DCNQI)2Cuの強磁場物性2022

    • Author(s)
      今城周作、松山直史、横森創、森初果、金道浩一
    • Organizer
      日本物理学会2022年秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] クロムスピネル酸化物HgCr2O4のパルス強磁場下比熱測定2021

    • Author(s)
      木村尚次郎, 今城周作, 厳正輝, 桃井勉, 萩原政幸, 植田浩明, 小濱芳允
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] FFLO超伝導におけるネマティック応答2021

    • Author(s)
      今城周作, 野村肇宏, 小濱芳允, 金道浩一
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 有機反強磁性体λ-(BEDSe-TTF)2GaCl4の磁気トルク法による磁気構造の研究2021

    • Author(s)
      小林拓矢, 簗田春希, 安村乃絵瑠, 谷口弘三, 今城周作, 松尾晶, 金道浩一
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] λ型BETS塩における負の磁気抵抗と磁場誘起絶縁体金属転移2021

    • Author(s)
      福岡脩平, 今城周作, 岡太耀, 井原慶彦, 河本充司, 金道浩一
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] κ型有機超伝導体の相境界近傍における熱的挙動2021

    • Author(s)
      松村祐希, 今城周作, 山下智史, 圷広樹, 中澤康浩
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 鉄系超伝導体Fe(Se,Te)のネマティック量子臨界点近傍における輸送特性2021

    • Author(s)
      石田浩祐, 向笠清隆, 今城周作, 邱明;, 斎藤三樹彦, 松浦康平, 杉村優一, 金道浩一, 芝内孝禎
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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