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Dipolar quantum liquid phase induced by dynamics of strongly correlated pi-electrons and combined molecular lattice

Research Project

Project/Area Number 19H01833
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
Research InstitutionTohoku University

Principal Investigator

Sasaki Takahiko  東北大学, 金属材料研究所, 教授 (20241565)

Co-Investigator(Kenkyū-buntansha) 松浦 直人  一般財団法人総合科学研究機構(総合科学研究センター(総合科学研究室)及び中性子科学センター(研究開発, 中性子科学センター, 主任研究員 (30376652)
中 惇  東京電機大学, 理工学部, 准教授 (60708527)
Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2022: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2020: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2019: ¥10,660,000 (Direct Cost: ¥8,200,000、Indirect Cost: ¥2,460,000)
Keywords分子性有機導体 / 量子スピン液体 / ダイマーダイポール / 強相関電子系 / パイ電子 / フォノン / 量子液体 / 中性子散乱 / 分極自由度 / 量子電荷液体 / 分子性物質 / 強相関パイ電子系
Outline of Research at the Start

分子性物質の特徴が現れる階層的な低エネルギー電子-格子(フォノン)ダイナミクスの解明を目指します.本研究の進展により分子性物質が示す電子物性の背後にある階層的フォノンの重要性を解き明かされ,その結果として,スピン/電荷系のゆらぎの増強により創出される量子液体状態の解明,そしてフォノン結合や分極性を起源とする量子液体創出への新ルートを提案します.このような有機物質フォノン研究は,自然界の未解決問題の一つであるガラス状態の謎に対して,パイ電子系を対象として挑戦するものです.さらに,将来の有機フォノンサイエンス・エンジニアリングの礎となるものです.

Outline of Final Research Achievements

In this study, we aim to explore novel quantum liquid states, i.e., electron dielectric and dipole liquids, charge glasses, and spin liquids with phonon-assisted and phonon-enhanced polarization degrees of freedom, produced by the coupling of the hierarchical intramolecular vibration-lattice vibration (phonon) dynamics characteristic of BEDT-TTF molecular conductors with the strongly correlated pi-electron charge and spin degrees of freedom. The quantum spin liquid material k-(BEDT-TTF)2Cu2(CN)3 and the antiferromagnetic Mott insulator k-BEDT-TTF)2Cu[N(CN)2]Cl have been investigated at ILL thermal neutron reactor in Grenoble, France. We have succeeded in measuring specific phonons coupled with pi-electron's charge and spin dynamics in collaboration with overseas collaborators in France and Germany. The phonon linewidth anomaly in each experiment reveals the importance of phonon dynamics.

Academic Significance and Societal Importance of the Research Achievements

本研究の実施により明らかになった強相関系分子性有機導体におけるパイ電子電荷・スピンダイナミクスと結合したフォノン異常についての成果は,量子スピン液体や電荷ガラス状態などの量子的なパイ電子の振る舞いにおける階層的な分子格子構造の重要性を明確に示したものである.また,将来,高分子系・生体系などのさらなる複雑な分子格子系を有する有機物質の電子物性・信号伝達機構の解明や有機デバイス開発研究などにおいても,格子系ダイナミクスを取り込んだ有機フォノンサイエンスの礎としての意義を有する成果である.

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (49 results)

All 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (8 results) Journal Article (14 results) (of which Int'l Joint Research: 9 results,  Peer Reviewed: 14 results,  Open Access: 4 results) Presentation (24 results) (of which Int'l Joint Research: 5 results) Remarks (3 results)

  • [Int'l Joint Research] Institute Laue-Langevin(フランス)

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

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Goethe University Frankfurt/Max Planck Institute for CPfS(ドイツ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Institut Laue-Langevin(フランス)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Goethe University Frankfurt/Max Planck Institute for CPfS(ドイツ)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Institut Laue-Langevin(フランス)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Goethe-University, Frankfurt/Max Planck-Institute fur CPfS/Heinz Maier-Leibnitz Zentrum, TU-Munchen(ドイツ)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Institut Laue-Langevion(フランス)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Phonon renormalization effects accompanying the 6 K anomaly in the quantum spin liquid candidate κ-(BEDT-TTF)2Cu2(CN)32022

    • Author(s)
      Matsuura Masato、Sasaki Takahiko、Naka Makoto、Muller Jens、Stockert Oliver、Piovano Andrea、Yoneyama Naoki、Lang Michael
    • Journal Title

      Physical Review Research

      Volume: 4 Issue: 4

    • DOI

      10.1103/physrevresearch.4.l042047

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Monomer Mott Insulator (BEDT-TTF)Cu[N(CN)<sub>2</sub>]<sub>2</sub> as a Potential Nodal Line System2022

    • Author(s)
      Yoneyama Naoki、Nuryadin Muhammad Khalish、Tsumuraya Takao、Iguchi Satoshi、Takei Takahiro、Kumada Nobuhiro、Nagao Masanori、Tanaka Isao、Sasaki Takahiko
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 91 Issue: 11 Pages: 113704-113704

    • DOI

      10.7566/jpsj.91.113704

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Optical Conductivity Spectra of Charge-Crystal and Charge-Glass States in a Series of θ-Type BEDT-TTF Compounds2022

    • Author(s)
      Hashimoto Kenichiro、Kobayashi Ryota、Ohkura Satoshi、Sasaki Satoru、Yoneyama Naoki、Suda Masayuki、Yamamoto Hiroshi M.、Sasaki Takahiko
    • Journal Title

      Crystals

      Volume: 12 Issue: 6 Pages: 831-831

    • DOI

      10.3390/cryst12060831

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Comparison of the charge-crystal and charge-glass state in geometrically frustrated organic conductors studied by fluctuation spectroscopy2022

    • Author(s)
      Thomas Tatjana、Thyzel Tim、Sun Hungwei、Muller Jens、Hashimoto Kenichiro、Sasaki Takahiko、Yamamoto Hiroshi M.
    • Journal Title

      Physical Review B

      Volume: 105 Issue: 20 Pages: 205111-205111

    • DOI

      10.1103/physrevb.105.205111

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Involvement of structural dynamics in charge-glass formation in strongly frustrated molecular metals2022

    • Author(s)
      Thomas Tatjana、Saito Yohei、Agarmani Yassine、Thyzel Tim、Lonsky Martin、Hashimoto Kenichiro、Sasaki Takahiko、Lang Michael、M?ller Jens
    • Journal Title

      Physical Review B

      Volume: 105 Issue: 4 Pages: 041114-041114

    • DOI

      10.1103/physrevb.105.l041114

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Magnetic Torque due to Anisotropic Diamagnetism in Neutral BEDT-TTF Crystals2021

    • Author(s)
      Uji Shinya、Terashima Taichi、Sugiura Shiori、Iguchi Satoshi、Sasaki Takahiko、Hashimoto Kenichiro、Shimozawa Masaaki、Yoneyama Naoki、Kato Reizo
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 90 Issue: 11 Pages: 113708-113708

    • DOI

      10.7566/jpsj.90.113708

    • NAID

      210000159428

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Emergence of unconventional spin glass-like state in k-(ET)2Cu[N(CN)2]Cl by introducing weak randomness2021

    • Author(s)
      Yamamoto Riku、Furukawa Tetsuya、Miyagawa Kazuya、Sasaki Takahiko、Kanoda Kazushi、Itou Tetsuaki
    • Journal Title

      Physical Review B

      Volume: 104 Issue: 15 Pages: 155107-155107

    • DOI

      10.1103/physrevb.104.155107

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Elucidation of local structure deformation in k-(BEDT-TTF)2Cu[N(CN)2]Br by x-ray fluorescence holography2021

    • Author(s)
      Ang Artoni Kevin R.、Marumi Riho、Sato-Tomita Ayana、Kimura Koji、Happo Naohisa、Akagi Kazuto、Sasaki Takahiko、Hayashi Kouichi
    • Journal Title

      Physical Review B

      Volume: 103 Issue: 21 Pages: 214106-214106

    • DOI

      10.1103/physrevb.103.214106

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Charge Ordering and pi-d Interaction in Electron Doped 3/4-Filling Molecular System a"-(BEDT-TTF)2Rb2xCo(SCN)4(x = 0.6)2021

    • Author(s)
      Iguchi Satoshi、Yamada Syuhei、Kobayashi Ryota、Morita Koutaro、Kudo Yuki、Kurosu Megumi、Yoneyama Naoki、Ikemoto Yuka、Moriwaki Taro、Sasaki Takahiko
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 90 Issue: 7 Pages: 074701-074701

    • DOI

      10.7566/jpsj.90.074701

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Petahertz non-linear current in a centrosymmetric organic superconductor2020

    • Author(s)
      Y. Kawakami, T. Amano, H. Ohashi, H. Itoh, Y. Nakamura, H. Kishida, T. Sasaki, G. Kawaguchi, H. M. Yamamoto, K. Yamamoto, S. Ishihara, K. Yonemitsu, and S. Iwai
    • Journal Title

      Nature Communications

      Volume: 11 Issue: 1 Pages: 4138-4138

    • DOI

      10.1038/s41467-020-17776-3

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Quantum Disordering of an Antiferromagnetic Order by Quenched Randomness in an Organic Mott Insulator2020

    • Author(s)
      Urai Mizuki、Miyagawa Kazuya、Sasaki Takahiko、Taniguchi Hiromi、Kanoda Kazushi
    • Journal Title

      Physical Review Letters

      Volume: 124 Issue: 11

    • DOI

      10.1103/physrevlett.124.117204

    • Related Report
      2020 Annual Research Report 2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Electronic Griffiths Phase in Disordered Mott-Transition Systems2020

    • Author(s)
      Yamamoto Riku、Furukawa Tetsuya、Miyagawa Kazuya、Sasaki Takahiko、Kanoda Kazushi、Itou Tetsuaki
    • Journal Title

      Physical Review Letters

      Volume: 124 Issue: 4 Pages: 046404-046404

    • DOI

      10.1103/physrevlett.124.046404

    • Related Report
      2020 Annual Research Report 2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] X-ray fluorescence holography for soft matter2019

    • Author(s)
      Ang Artoni Kevin Roquero、Sato-Tomita Ayana、Shibayama Naoya、Umena Yasufumi、Happo Naohisa、Marumi Riho、Kimura Koji、Matsushita Tomohiro、AKAGI Kazuto、Sasaki Takahiko、Sasaki Yuji C.、Hayashi Kouichi
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: 1 Pages: 010505-010505

    • DOI

      10.7567/1347-4065/ab5d55

    • Related Report
      2020 Annual Research Report 2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Lattice Dynamics Coupled to Charge and Spin Degrees of Freedom in the Molecular Dimer-Mott Insulator κ-(BEDT-TTF)2;Cu[(N(CN2)]Cl2019

    • Author(s)
      Masato Matsuura, Takahiko Sasaki, Satoshi Iguchi, Elena Gati, Jens Muller, Oliver Stockert, Andrea Piovano, Martin Bohm, Jitae T. Park, Sananda Biswas, Stephen M. Winter, Roser Valenti, Akiko Nakao, and Michael Lang
    • Journal Title

      Phys Rev Lett.

      Volume: 123 Issue: 2 Pages: 027601-027601

    • DOI

      10.1103/physrevlett.123.027601

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 異方性結晶における偏光変調法を用いた赤外磁気光学カー効果測定III2023

    • Author(s)
      井口敏, 小林広樹, 池本夕佳, 古川哲也, 伊藤弘毅, 岩井伸一郎, 森脇太郎, 佐々木孝彦
    • Organizer
      日本物理学会 2023年春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] モノマーモット絶縁体(ET)Cu[N(CN)2]2の誘電特性2023

    • Author(s)
      西村雄磨, 米山直樹, M.K.Nuryadin, 圓谷貴夫, 井口敏, 佐々木孝彦
    • Organizer
      日本物理学会 2023年春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 層状有機超伝導体κ-(BEDT-TTF)2Cu(NCS)2における抵抗ノイズ測定2023

    • Author(s)
      杉浦栞理, 佐々木孝彦, T. Thyzel, J. Mueller
    • Organizer
      日本物理学会 2023年春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Nonmagnetic disorder effect to the FFLO phase in layered organic superconductor k-(BEDT-TTF)2Cu(NCS)22023

    • Author(s)
      Shiori Sugiura, Shusaku Imajo, Motoi Kimata, Shinya Uji, Taich Terashima, Koichi Kindo, Takahiko Sasaki
    • Organizer
      American Physical Society March meeting 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] FFLO phase diagram of layered organic superconductor k-(BEDT-TTF)2Cu(NCS)2 with nonmagnetic disorder2023

    • Author(s)
      Shiori Sugiura , Shusaku Imajo, Motoi Kimata, Shinya Uji, Taichi Terashima, Koichi Kindo, Takahiko Sasaki
    • Organizer
      The 14th International Symposium on Crystalline Organic Metals, Superconductors and Magnets
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 層状有機超伝導体κ-(BEDT-TTF)2Cu(NCS)2のFFLO超伝導相における乱れの効果2022

    • Author(s)
      杉浦栞理, 今城周作, 木俣基, 宇治進也, 寺嶋太一, 金道浩一, 佐々木孝彦
    • Organizer
      日本物理学会2022年秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 量子スピン液体候補物質κ-(BEDT-TTF)2Cu2CN3の6K異常における格子ダイナミクス2022

    • Author(s)
      松浦直人, 佐々木孝彦, 中惇, Jens Mueller, Michael Lang, Oliver Stockert and A. Piovano
    • Organizer
      日本物理学会2022年秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 層状反強磁性モット絶縁体κ-(ET)2Cu[N(CN)2]Clにおける熱伝導2022

    • Author(s)
      古川哲也, 谷口弘三, 佐々木孝彦
    • Organizer
      日本物理学会2022年秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 異方性結晶における偏光変調法を用いた赤外磁気光学カー効果測定 I2022

    • Author(s)
      井口敏, 池本夕佳, 小林広樹, 北澤英明, 伊藤弘毅, 岩井伸一郎, 森脇太郎, 佐々木孝彦
    • Organizer
      日本物理学会2022年秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 異方性結晶における偏光変調法を用いた赤外磁気光学カー効果測定 II2022

    • Author(s)
      小林広樹, 井口敏, 池本夕佳, 北澤英明, 伊藤弘毅, 岩井伸一郎, 森脇太郎, 佐々木孝彦
    • Organizer
      日本物理学会2022年秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ESR studies on spin-singlet transition in organic salt (BEDT-TTF)Cu[N(CN)2]22022

    • Author(s)
      M. K. Nuryadin, Y. Oshima, N. Yoneyama, S. Iguchi, and T. Sasaki
    • Organizer
      日本物理学会2022年秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Randomness Effect on the Correlated p-electrons in Molecular Organic Superconductors with Quenched Disorder Introduced by X-ray Irradiation2022

    • Author(s)
      T. Sasaki, N. Sato, T. M. Moriya, S. Sugiura, Y. Ikemoto, T. Moriwaki, and N. Yoneyama
    • Organizer
      29th International conference on Low Temperature Physics
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Inelastic neutron scattering study on lattice dynamics at the 6K anomaly in the quantum spin liquid candidate k-(BEDT-TTF)2Cu2CN32022

    • Author(s)
      M. Matsuura, Takahiko Sasaki, Makoto Naka, Jens Mueller, Oliver Stockert, and Andrea Piovano, Naoki Yoneyama, Michael Lang
    • Organizer
      Asia-Pacific Conference on Condensed Matter Physics 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] エックス線照射により分子欠陥を導入した強相関有機超伝導体の赤外分光測定2022

    • Author(s)
      佐々木孝彦
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Inelastic neutron scattering experiments of quantum spin liquid molecular material2022

    • Author(s)
      Takahiko Sasaki
    • Organizer
      QLC meeting 2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] Lattice dynamics coupled to charge and spin degrees of freedom in the molecular dimer-Mott insulator2021

    • Author(s)
      Takahiko Sasaki
    • Organizer
      International Conference on Quantum Liquid Crystals 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 分子性有機導体k-(d8-BEDT-TTF)2Cu[N(CN)2]Brのエックス線照射効果2021

    • Author(s)
      佐々木孝彦, 佐藤直道, 米山直樹
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Charge and spin cluster/liquid crystal state and superconductivity induced by coupling between phonon and the charge/spin liquid state in strongly correlated pi-electrons system2020

    • Author(s)
      Takahiko Sasaki
    • Organizer
      QLC A01 Kickoff meeting
    • Related Report
      2020 Annual Research Report
  • [Presentation] 傾斜エックス線照射した分子性有機導体 k-(BEDT-TTF)2Xの赤外分光2020

    • Author(s)
      佐々木孝彦, 佐藤直道, 古川哲也, 杉浦栞理, 井口敏, 米山直樹, L. Kang, 赤木和人, 池本夕佳, 森脇太郎
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 放射光赤外顕微分光による強相関電子系分子性物質の電荷ダイナミクスの研究2020

    • Author(s)
      佐々木孝彦, 井口敏, 池本夕佳, 森脇太郎
    • Organizer
      SPring-8シンポジウム2020
    • Related Report
      2020 Annual Research Report
  • [Presentation] Nanoscale polarized clusters in a molecular dimer-Mott insulator as precursors of electronic ferroelectricity probed by conductance noise spectroscopy2020

    • Author(s)
      Takahiko Sasaki
    • Organizer
      QLC meeting 2020
    • Related Report
      2020 Annual Research Report
  • [Presentation] ダイマーモット系 κ-(BEDT-TTF)2Cu[N(CN)2]X (X=Cl, Br)における格子ダイナミクス2020

    • Author(s)
      松浦直人, 小林亮太, 黒子めぐみ, 井口敏, 佐々木孝彦, Elena Gati, Benedikt Hartmann, Jens Mueller, Oliver Stockert, Michael Lang, and A. Piovano
    • Organizer
      日本物理学会第75回年次大会(2020年)
    • Related Report
      2019 Annual Research Report
  • [Presentation] 傾斜エックス線照射した有機超伝導体κ-(BEDT-TTF)2Cu[N(CN)2]Brの赤外分光2020

    • Author(s)
      佐々木孝彦, 佐藤直道, 古川哲也, 杉浦栞理, 井口敏, 米山直樹, L. Kang, 赤木和人, 池本夕佳, 森脇太郎
    • Organizer
      日本物理学会第75回年次大会(2020年)
    • Related Report
      2019 Annual Research Report
  • [Presentation] κ-(BEDT-TTF)2Cu[N(CN)2]BrのX線照射欠陥モデルと分子動力学2020

    • Author(s)
      赤木和人, Artoni Kevin R Ang, Lijing Kang, 林好一, 佐々木孝彦
    • Organizer
      日本物理学会第75回年次大会(2020年)
    • Related Report
      2019 Annual Research Report
  • [Remarks] 東北大学金属材料研究所低温電子物性学研究部門

    • URL

      http://cond-phys.imr.tohoku.ac.jp/

    • Related Report
      2022 Annual Research Report
  • [Remarks] 東北大学金属材料研究所低温電子物性学研究部門HP

    • URL

      http://cond-phys.imr.tohoku.ac.jp/index.html

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
  • [Remarks] 東北大学金属材料研究所佐々木研究室

    • URL

      http://cond-phys.imr.tohoku.ac.jp/

    • Related Report
      2019 Annual Research Report

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Published: 2019-04-18   Modified: 2024-01-30  

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