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New frontiers in organic triangular lattice spin liquids

Research Project

Project/Area Number 20H02709
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 32020:Functional solid state chemistry-related
Research InstitutionKyoto University

Principal Investigator

Maesato Mitsuhiko  京都大学, 理学研究科, 准教授 (60324604)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2022: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥9,620,000 (Direct Cost: ¥7,400,000、Indirect Cost: ¥2,220,000)
Keywordsスピン液体 / モット絶縁体 / 低温電子物性 / デバイス / 電界効果トランジスタ
Outline of Research at the Start

幾何学的なフラストレーションによって絶対零度まで磁気秩序が抑制された量子スピン液体は、非常に興味深い研究対象である。しかしながらこれまでに発見された有機三角格子スピン液体はその結晶構造に乱れを伴っている。本研究では構造に乱れの無い三角格子をもつ有機スピン液体を開発し、スピンフラストレーションと構造の乱れの効果をはっきりと切り分けてスピン液体の本質を解明する。また、電界効果によるスピン液体へのキャリア注入やスピン流の注入によりスピン液体デバイスを構築し、凝縮相・コヒーレンスの制御とスピントロニクスへの応用を目指す。

Outline of Final Research Achievements

When spins are localized on a triangular lattice with antiferromagnetic interactions between neighboring spins, a quantum spin liquid state can be expected in which long-range magnetic ordering is suppressed down to extremely low temperature due to geometrical frustration effects. However, all organic triangular lattice spin liquid candidates discovered so far are accompanied by disorder in their crystal structure, and the effects of frustration and disorder remain unclear.
In this study, we aim to develop organic spin liquids with a triangular lattice free from disordered structure and have succeeded in synthesizing a promising material. We performed various magnetic measurements down to very low temperature and found that the material is a good candidate for a quantum spin liquid. However, it was also found that a small amount of Cu(II) ions were contaminated in the anion layer as magnetic impurities.

Academic Significance and Societal Importance of the Research Achievements

幾何学的なフラストレーション効果によって極低温まで長距離の磁気秩序が抑制された量子スピン液体状態は、非自明な量子状態として興味深いだけでなく、量子コンピューターへの応用なども期待され、近年注目を集めている。ところが、実際の物質では構造の乱れの影響が無視できず、フラストレーションと乱れの効果が明確でない。本研究では、陰イオン層の構造の乱れが抑制された新しい有機三角格子系の開発に成功し、乱れの無い量子スピン液体の実現に向けた新たな指針を得ることができた。

Report

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

    (39 results)

All 2023 2022 2021 2020

All Journal Article (17 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 17 results,  Open Access: 1 results) Presentation (21 results) (of which Int'l Joint Research: 6 results,  Invited: 1 results) Book (1 results)

  • [Journal Article] Tuning Spin Correlation of Molecular Mott Insulators2023

    • Author(s)
      清水 康弘, 前里 光彦
    • Journal Title

      Butsuri

      Volume: 78 Issue: 1 Pages: 22-27

    • DOI

      10.11316/butsuri.78.1_22

    • ISSN
      0029-0181, 2423-8872
    • Year and Date
      2023-01-05
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] High-Performance All-Solid-State Proton Rectifier Using a Heterogeneous Membrane Composed of Coordination Polymer and Layered Double Hydroxide2022

    • Author(s)
      J. Lu, Y. Yoshida, M. Maesato, H. Kitagawa
    • Journal Title

      Angew. Chem. Int. Ed.

      Volume: 61 Issue: 50

    • DOI

      10.1002/anie.202213077

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Rational Construction of Molecular Electron-Conducting Nanowires Encapsulated in Proton-Conducting Matrix in a Charge Transfer Salt2022

    • Author(s)
      M. Donoshita, Y. Yoshida, M. Maesato, H. Kitagawa
    • Journal Title

      J. Am. Chem. Soc.

      Volume: 144 Issue: 37 Pages: 17149-17155

    • DOI

      10.1021/jacs.2c07258

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Systematic tuning of the magnetic properties in mixed-metal MOF-742022

    • Author(s)
      M. Mukoyoshi, M. Maesato, S. Kawaguchi, Y. Kubota, K. Cho, Y. Kitagawa, H. Kitagawa
    • Journal Title

      Inorg. Chem.

      Volume: 61 Issue: 19 Pages: 7226-7230

    • DOI

      10.1021/acs.inorgchem.2c00646

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] An Approach to an Ideal Molecule-Based Mixed Conductor with Comparable Proton and Electron Conductivity2022

    • Author(s)
      Kimura Yojiro、Yoshida Yukihiro、Tanaka Yuki、Maesato Mitsuhiko、Komatsu Tokutaro、Kitagawa Hiroshi
    • Journal Title

      Inorganic Chemistry

      Volume: 61 Issue: 10 Pages: 4453-4458

    • DOI

      10.1021/acs.inorgchem.1c03956

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Heavy Hydrogen Doping into ZnO and the H/D Isotope Effect2021

    • Author(s)
      Nakayama Ryo、Maoesato Mitsuhiko、Lim GyeongCheol、Arita Makoto、Kitagawa Hiroshi
    • Journal Title

      Journal of the American Chemical Society

      Volume: 143 Issue: 17 Pages: 6616-6621

    • DOI

      10.1021/jacs.1c02039

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ni@onion-like carbon and Co@amorphous carbon: control of carbon structures by metal ion species in MOFs2021

    • Author(s)
      Mukoyoshi Megumi、Kobayashi Hirokazu、Kusada Kohei、Otsubo Kazuya、Maesato Mitsuhiko、Kubota Yoshiki、Yamamoto Tomokazu、Matsumura Syo、Kitagawa Hiroshi
    • Journal Title

      Chemical Communications

      Volume: 57 Issue: 48 Pages: 5897-5900

    • DOI

      10.1039/d1cc02154k

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic field driven transition between valence bond solid and antiferromagnetic order in a distorted triangular lattice2021

    • Author(s)
      Y. Shimizu, M. Maesato, M. Yoshida, M. Takigawa, M. Itoh, A. Otsuka, H. Yamochi, Y. Yoshida, G. Kawaguchi, D. Graf, and G. Saito
    • Journal Title

      Phys. Rev. Research

      Volume: 3 Issue: 2 Pages: 023145-023145

    • DOI

      10.1103/physrevresearch.3.023145

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Heavy carrier doping by hydrogen in the spin-orbit coupled Mott insulator Sr2IrO42021

    • Author(s)
      Yamashita Y.、Lim G.、Maruyama T.、Chikamatsu A.、Hasegawa T.、Ogino H.、Ozawa T.、Wilde M.、Fukutani K.、Terashima T.、Ochi M.、Kuroki K.、Kitagawa H.、Maesato M.
    • Journal Title

      Physical Review B

      Volume: 104 Issue: 4 Pages: 41111-41111

    • DOI

      10.1103/physrevb.104.l041111

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Surface morphology-induced spin-crossover-inactive high-spin state in a coordination framework2021

    • Author(s)
      Sakaida Shun、Otsubo Kazuya、Otake Ken-ichi、Kawaguchi Shogo、Maesato Mitsuhiko、Kitagawa Susumu、Kitagawa Hiroshi
    • Journal Title

      Chemical Communications

      Volume: 57 Issue: 12 Pages: 1462-1465

    • DOI

      10.1039/d0cc06682f

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Molecule-based Mixed Conductor of Proton and Electron Composed of Neutral π-planar Metal Complexes2021

    • Author(s)
      Y. Kimura, Y. Yoshida, M. Maesato, H. Kitagawa
    • Journal Title

      Chemistry Letters

      Volume: 50 Issue: 3 Pages: 439-441

    • DOI

      10.1246/cl.200781

    • NAID

      130007995483

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] First Observation of Superconductivity in Molybdenum-Ruthenium-Carbon Alloy Nanoparticles2021

    • Author(s)
      S. Okazoe, K. Kusada, Y. Yoshida, M. Maesato, T. Yamamoto, T. Toriyama, S. Matsumura, S. Kawaguchi, Y. Kubota, H. Kitagawa
    • Journal Title

      Chemistry Letters

      Volume: 50 Issue: 4 Pages: 596-598

    • DOI

      10.1246/cl.200779

    • NAID

      130008025795

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Triangular-lattice Organic Mott Insulator with Disorder-free Polyanion2020

    • Author(s)
      S. Tomeno, M. Maesato, Y. Yoshida, A. Kiswandhi, H. Kitagawa
    • Journal Title

      Inorganic Chemistry

      Volume: 59 Issue: 13 Pages: 8647-8651

    • DOI

      10.1021/acs.inorgchem.0c00880

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] High Pressure Investigation of Organic 3D Dirac Semimetal Candidate Having a Diamond Lattice2020

    • Author(s)
      A. Kiswandhi, M. Maesato, S. Tomeno, Y. Yoshida, Y. Shimizu, P. Shahi, J. Gouchi, Y. Uwatoko, G. Saito, H. Kitagawa
    • Journal Title

      Physical Review B

      Volume: 101 Issue: 24 Pages: 245124-245124

    • DOI

      10.1103/physrevb.101.245124

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Reversible resistance switching by excess hydrogen doping in rutile TiO22020

    • Author(s)
      Lim GyeongCheol、Maesato Mitsuhiko、Nakayama Ryo、Lim Dae-Woon、Kitagawa Hiroshi
    • Journal Title

      Applied Physics Express

      Volume: 13 Issue: 10 Pages: 105502-105502

    • DOI

      10.35848/1882-0786/abb872

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] New Series of Pentanary Oxides, AM2C6Te3O18 (A = Pb, Sr; M = Mn, Cd; C = Ni, Co): Synthesis, Structure, and Magnetic and Optical Properties2020

    • Author(s)
      G. Sivakumar, M. Mazumder, A. Lahiri, A. Sundaresan, S. K. Pati, M. Maesato, H. Kitagawa, J. Gopalakrishnan, S. Natarajan
    • Journal Title

      Journal of Physical Chemistry C

      Volume: 29 Issue: 45 Pages: 25071-25077

    • DOI

      10.1021/acs.jpcc.0c07233

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Crystal Size Effect on the Spin-Crossover Behavior of {Fe(py)2[Pt(CN)4]} (py = Pyridine) Monitored by Raman Spectroscopy2020

    • Author(s)
      Sakaida Shun、Otsubo Kazuya、Maesato Mitsuhiko、Kitagawa Hiroshi
    • Journal Title

      Inorganic Chemistry

      Volume: 59 Issue: 23 Pages: 16819-16823

    • DOI

      10.1021/acs.inorgchem.0c02874

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] 有機伝導体における次元性・フラストレーションとランダムネス2023

    • Author(s)
      前里光彦
    • Organizer
      分子系の複合電子機能 第 181 委員会 最終研究会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Summary for Metal-organic frameworks: Recent evolution for functional and quantum materials (Part II)2023

    • Author(s)
      Mitsuhiko Maesato
    • Organizer
      物理学会2023年春季大会 MOFシンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] Physical properties of a quantum spin liquid candidate κ-(ET)2Cu[Au(CN)2]Cl with disorder-free anion layer at low temperature2023

    • Author(s)
      Yuki Tanaka, Mitsuhiko Maesato, Shinya Tomeno, Yukihiro Yoshida, Yasuhiro ShimizuA, Hiroshi Kitagawa
    • Organizer
      物理学会2023年春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 新規有機伝導体κ''-(ET)2Cu[N(CN)2]Brの結晶構造および物性2023

    • Author(s)
      矢坂聡一朗, 前里光彦, 吉田幸大, 北川宏
    • Organizer
      物理学会2023年春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 構造に乱れのない量子スピン液体候補κ-(ET)2Cu[Au(CN)2]Clの低温物性2023

    • Author(s)
      田中 優輝、前里 光彦、留野 慎也、吉田 幸大、清水 康弘、北川 宏
    • Organizer
      日本化学会 第103春季年会 (2023)
    • Related Report
      2022 Annual Research Report
  • [Presentation] 新規有機伝導体κ''-(ET)2Cu[N(CN)2]Brの結晶構造および物性2023

    • Author(s)
      矢坂聡一朗, 前里光彦, 吉田幸大, 北川宏
    • Organizer
      日本化学会 第103春季年会 (2023)
    • Related Report
      2022 Annual Research Report
  • [Presentation] 水素イオンビームを用いたKTaO3に対する電子ドーピング2023

    • Author(s)
      平田 勧、前里 光彦、GyeongCheol Lim、小澤 孝拓、Markus Wilde、福谷 克之、北川 宏
    • Organizer
      日本化学会 第103春季年会 (2023)
    • Related Report
      2022 Annual Research Report
  • [Presentation] Search for Unconventional Superconductivity by Hydrogen Dose2022

    • Author(s)
      M. Maesato, Y. Yamashita, H. Kitagawa
    • Organizer
      29th International Conference on Low Temperature Physics (LT29)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Physical properties of a quantum spin liquid candidate κ-(ET)2Cu[Au(CN)2]Cl at low temperatures and high pressures2022

    • Author(s)
      Yuki Tanaka, Shinya Tomeno, Yukihiro Yoshida, Yasuhiro Shimizu, Hiroshi Kitagawa, Mitsuhiko Maesato
    • Organizer
      29th International Conference on Low Temperature Physics (LT29)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Crystal structure and physical properties of new organic conductor κ"-(ET)2Cu[N(CN)2]Br2022

    • Author(s)
      Soichiro Yasaka, Mitsuhiko Maesato, Yukihiro Yoshida, Hiroshi Kitagawa
    • Organizer
      29th International Conference on Low Temperature Physics (LT29)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] New Spin Liquid Candidate κ-(ET)2Cu[Au(CN)2]Cl with Disorder-Free Anion Layer2022

    • Author(s)
      M. Maesato, Y. Tanaka, S. Tomeno, Y. Yoshida, S. Yasuhiro, H. Kitagawa
    • Organizer
      14th International Symposium on Crystalline Organic Metals, Superconductors and Magnets (ISCOM2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Physical properties of a quantum spin liquid candidate κ-(ET)2Cu[Au(CN)2]Cl at low temperatures and high pressures2022

    • Author(s)
      Yuki Tanaka, Shinya Tomeno, Yukihiro Yoshida, Yasuhiro Shimizu, Hiroshi Kitagawa, Mitsuhiko Maesato
    • Organizer
      14th International Symposium on Crystalline Organic Metals, Superconductors and Magnets (ISCOM2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Crystal structure and physical properties of new organic conductor κ"-(ET)2Cu[N(CN)2]Br2022

    • Author(s)
      Soichiro Yasaka, Mitsuhiko Maesato, Yukihiro Yoshida, Hiroshi Kitagawa
    • Organizer
      14th International Symposium on Crystalline Organic Metals, Superconductors and Magnets (ISCOM2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 量子スピン液体候補κ-(ET)2Cu[Au(CN)2]Clの低温・高圧物性2022

    • Author(s)
      田中優輝, 前里光彦, 留野慎也, 吉田幸大, 清水康弘, 北川宏
    • Organizer
      日本物理学会 第77回年次大会(2022年)
    • Related Report
      2021 Annual Research Report
  • [Presentation] 水素イオンビーム照射を用いたLa置換Sr2IrO4に対する電子ドーピング2022

    • Author(s)
      山下裕太, 前里光彦, GyeongCheol Lim, 近松彰, 長谷川哲也, 小澤孝拓, Markus Wilde, 福谷克之, 北川宏, 越智正之
    • Organizer
      日本物理学会 第77回年次大会(2022年)
    • Related Report
      2021 Annual Research Report
  • [Presentation] 量子スピン液体候補κ-(ET)2Cu[Au(CN)2]Clの低温・高圧物性2022

    • Author(s)
      田中 優輝、前里 光彦、留野 慎也、吉田 幸大、北川 宏
    • Organizer
      日本化学会 第102春季年会 (2022)
    • Related Report
      2021 Annual Research Report
  • [Presentation] 水素イオンビーム照射を用いたLa置換Sr2IrO4に対する電子ドーピング2022

    • Author(s)
      山下 裕太、前里 光彦、Lim GyeongCheol、近松 彰、長谷川 哲也、小澤 孝拓、Wilde Markus、福谷 克之、北川 宏
    • Organizer
      日本化学会 第102春季年会 (2022)
    • Related Report
      2021 Annual Research Report
  • [Presentation] Proton rectification of heterogeneous membrane based on proton conducting metal-organic framework and hydroxy conducting layered double hydroxide2022

    • Author(s)
      Jiangfeng Lu, Yukihiro Yoshida, Mitsuhiko Maesato, Hiroshi Kitagawa
    • Organizer
      日本化学会 第102春季年会 (2022)
    • Related Report
      2021 Annual Research Report
  • [Presentation] 水素イオン照射によるSr2IrO4薄膜への電子ドーピング2021

    • Author(s)
      山下裕太,前里光彦,GyeongCheol Lim,丸山敬裕,近松彰,荻野拓,長谷川哲也,小澤孝拓,Markus Wilde,福谷克之,寺嶋孝仁,北川宏
    • Organizer
      日本物理学会 第76回年次大会(2021年)
    • Related Report
      2020 Annual Research Report
  • [Presentation] Electron Doping into Sr2IrO4 by Hydrogen Ion Beam Irradiation2021

    • Author(s)
      Y. Yamashita, M. Maesato, G. Lim, T. Maruyama, A. Chikamatsu, H. Ogino, T. Hasegawa, T. Ozawa, M. Wilde, K. Fukutani, T. Terashima, H. Kitagawa
    • Organizer
      日本化学会 第101春季年会 (2021)
    • Related Report
      2020 Annual Research Report
  • [Presentation] Ultra-high concentration hydrogen doping into rutile-TiO2 with in situ transport measurements2021

    • Author(s)
      GyeongCheol Lim, Mitsuhiko Maesato, Ryo Nakayama, Dae-Woon Lim, Takahiro Ozawa, Markus Wilde, Katsuyuki Fukutani, Hiroshi Kitagawa
    • Organizer
      日本化学会 第101春季年会 (2021)
    • Related Report
      2020 Annual Research Report
  • [Book] Recent Topics on Organic Spin Liquid Candidates. In: Nishimura, K., Murase, M., Yoshimura, K. (eds) Creative Complex Systems. Creative Economy2021

    • Author(s)
      Maesato Mitsuhiko
    • Total Pages
      15
    • Publisher
      Springer, Singapore
    • ISBN
      9789811644573
    • Related Report
      2021 Annual Research Report

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

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