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Search for massive Dirac phase by NMR in an extended pressure region

Research Project

Project/Area Number 17K05532
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Condensed matter physics II
Research InstitutionThe University of Tokyo

Principal Investigator

Miyagawa Kazuya  東京大学, 大学院工学系研究科(工学部), 助教 (90302760)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsディラック電子系 / 有機導体 / 核磁気共鳴 / 輸送現象 / 圧力 / 電気抵抗 / 単一成分分子性導体 / 高圧力下
Outline of Final Research Achievements

In this project, the organic compounds that consist of molecules and is bulk system, give the Dirac electron system. Most of organic Dirac electron system appear under pressure. We try to find massive Dirac electron system by Nuclear Magnetic Resonance (NMR) measurements in extending pressure region, like as higher pressure than conventional clump type cell and uni-axial pressure.
We found the pressure region where the massive Dirac state realizes, and ambient pressure organic Dirac system. Moreover, in the pressurization method, we have realized NMR measurement by pressure application that exceeds the conventional hydraulic clamp method and uni-axial pressurization (strain) .

Academic Significance and Societal Importance of the Research Achievements

ディラック電子系は電子の見かけの質量がゼロになることから通常のバンド電子と異なる振舞いをすることが広く知られている。このディラック電子系を出発点として、電子に質量を持たせるようにした系はマッシブディラック電子系と呼ばれ、ディラック電子系の特徴を有しており、これは単純にギャップの開いたバンド電子とは異なる。マッシブディラック電子の存在は理論的にはディラック電子系の出現時から指摘されてきたが、実際の実現例は少ない。本研究課題では圧力を制御することによって、可能性の高い圧力領域をしてきできた。加えて、常圧でもディラック電子を有する可能性のある物質や、加圧方式への挑戦を行った。

Report

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

    (26 results)

All 2020 2019 2018 2017

All Journal Article (16 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 16 results,  Open Access: 4 results) Presentation (10 results) (of which Int'l Joint Research: 5 results,  Invited: 1 results)

  • [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
      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
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Topological charge transport by mobile dielectric-ferroelectric domain walls2019

    • Author(s)
      Takehara R.、Sunami K.、Miyagawa K.、Miyamoto T.、Okamoto H.、Horiuchi S.、Kato R.、Kanoda K.
    • Journal Title

      Science Advances

      Volume: 5 Issue: 11

    • DOI

      10.1126/sciadv.aax8720

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] C13 NMR evidence for strong electron correlation and antiferromagnetic order in the single-component molecular material Pd(tmdt)22019

    • Author(s)
      Takahashi Taiga、Sunami Keishi、Miyagawa Kazuya、Takagi Rina、Zhou Biao、Kobayashi Akiko、Kanoda Kazushi
    • Journal Title

      Physical Review B

      Volume: 100 Issue: 7 Pages: 075117-075117

    • DOI

      10.1103/physrevb.100.075117

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Disorder unveils Mott quantum criticality behind a first-order transition in the quasi-two-dimensional organic conductor κ?(ET)2Cu[N(CN)2]Cl2019

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

      Physical Review B

      Volume: 99 Issue: 24

    • DOI

      10.1103/physrevb.99.245139

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Variation in the nature of the neutral-ionic transition in DMTTF-QCl4 under pressure probed by NQR and NMR2019

    • Author(s)
      K. Sunami, F. Iwase, K. Miyagawa, S. Horiuchi, K. Kobayashi, R. Kumai, and K. Kanoda
    • Journal Title

      Physical Review B

      Volume: 99 Issue: 12

    • DOI

      10.1103/physrevb.99.125133

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Single-component molecular conductor [Pt(dmdt)2];a three-dimensional ambient-pressure molecular Dirac electron system2019

    • Author(s)
      Biao Zhou, Shoji Ishibashi, Tatsuru Ishii, Takahiko Sekine, Ryosuke Takehara, Kazuya Miyagawa, Kazushi Kanoda, Eiji Nishibori and Akiko Kobayashi
    • Journal Title

      Chemical Communications

      Volume: 55 Issue: 23 Pages: 3327-3330

    • DOI

      10.1039/c9cc00218a

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Charge Order and Poor Glass-forming Ability of an Anisotropic Triangular-lattice System, θ-(BEDT-TTF)2TlCo(SCN)4, Investigated by NMR2019

    • Author(s)
      K. Miyagawa, T. Sato, H. Hashimoto, M. Kodama, K. Ohnoh, A. Ueda, H. Mori, and K. Kanoda
    • Journal Title

      Jouranal of Physical Society of Japan

      Volume: 88 Issue: 3 Pages: 034705-034705

    • DOI

      10.7566/jpsj.88.034705

    • NAID

      210000135132

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Strange metal from a frustration-driven charge order instability2019

    • Author(s)
      T. Sato, K. Kitai, K. Miyagawa, M. Tamura, A. Ueda, H. Mori and K. Kanoda
    • Journal Title

      Nature Materials

      Volume: 18 Issue: 3 Pages: 229-233

    • DOI

      10.1038/s41563-019-0284-9

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Evidence for solitonic spin excitations from a charge-lattice; coupled ferroelectric order2018

    • Author(s)
      K. Sunami, T. Nishikawa, K. Miyagawa, S. Horiuchi, R. Kato, T. Miyamoto, H. Okamoto and K. Kanoda
    • Journal Title

      Science Advances

      Volume: 4 Issue: 11

    • DOI

      10.1126/sciadv.aau7725

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Spin-lattice decoupling in a triangular-lattice quantum spin liquid2018

    • Author(s)
      Takayuki Isono, Shiori Sugiura, Taichi Terashima, Kazuya Miyagawa, Kazushi Kanoda and Shinya Uji
    • Journal Title

      Nature Communications

      Volume: 9 Issue: 1

    • DOI

      10.1038/s41467-018-04005-1

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Quasi-continuous transition from a Fermi liquid to a spin liquid in κ-(ET)2Cu2(CN)32018

    • Author(s)
      Furukawa Tetsuya、Kobashi Kazuhiko、Kurosaki Yosuke、Miyagawa Kazuya、Kanoda Kazushi
    • Journal Title

      Nature Communications

      Volume: 9 Issue: 1

    • DOI

      10.1038/s41467-017-02679-7

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Anomalous spin correlations and excitonic instability of interacting 2D Weyl fermions2017

    • Author(s)
      Hirata Michihiro、Ishikawa Kyohei、Matsuno Genki、Kobayashi Akito、Miyagawa Kazuya、Tamura Masafumi、Berthier Claude、Kanoda Kazushi
    • Journal Title

      Science

      Volume: 358 Issue: 6369 Pages: 1403-1406

    • DOI

      10.1126/science.aan5351

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Antiferromagnetic Mott insulating state in the single-component molecular material Pd(tmdt)22017

    • Author(s)
      Rina Takagi, Dita Puspita Sari, Saidah Sakinah Mohd-Tajudin, Retno Ashi, Isao Watanabe, Shoji Ishibashi, Kazuya Miyagawa, Satomi Ogura, Biao Zhou, Akiko Kobayashi, and Kazushi Kanoda
    • Journal Title

      Physical Review B

      Volume: 96 Issue: 21 Pages: 214432-214432

    • DOI

      10.1103/physrevb.96.214432

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Resonant inelastic x-ray scattering probes the electron-phonon coupling in the spin liquid κ-(BEDT-TTF)2Cu2(CN)32017

    • Author(s)
      V. Ilakovac, S. Carniato, P. Foury-Leylekian, S. Tomic, J.-P. Pouget, P. Lazic, Y. Joly, K. Miyagawa, K. Kanoda, and A. Nicolaou
    • Journal Title

      Physical Review B

      Volume: 96 Issue: 18

    • DOI

      10.1103/physrevb.96.184303

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Spin-gapped Mott insulator with the dimeric arrangement of twisted molecules Zn(tmdt)22017

    • Author(s)
      Rina Takagi, Hiro Gangi, Kazuya Miyagawa, Biao Zhou, Akiko Kobayashi, and Kazushi Kanoda
    • Journal Title

      Physical Review B

      Volume: 95 Issue: 22 Pages: 224427-224427

    • DOI

      10.1103/physrevb.95.224427

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] 13C NMR studies of the metallic, charge ordered and charge glass states in organic conductors, theta-(BEDT-TTF)2X2019

    • Author(s)
      K. Miyagwa, T. Sato, H. Murase, A. Ueda, H. Mori and K. Kanoda
    • Organizer
      International Conference on Strongly Correlated Electron Systems (SCES2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 常圧masslessディラック電子系Pt(dmdt)2の13C NMR測定2019

    • Author(s)
      関根孝彦, 須波圭史, 竹原陵介, 宮川和也, 周彪, 小林昭子, 鹿野田一司
    • Organizer
      日本物理学会 秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] θ-(BEDT-TTF)2I3の13Cおよび1H NMR測定2019

    • Author(s)
      宮川和也, 村瀬秀明, 佐藤拓朗, 田村雅史, 鹿野田一司
    • Organizer
      日本物理学会 秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] q-(BEDT-TTF)2X 塩のスピン-スピン緩和時間測定2019

    • Author(s)
      宮川 和也, 佐藤 拓朗, 橋本 凌, 上田 顕, 森 初果, 鹿野田 一司
    • Organizer
      日本物理学会
    • Related Report
      2018 Research-status Report
  • [Presentation] Spin and valley degree of freedom in a bulk massless-Dirac electron system, a-(BEDT-TTF)2I3 under magnetic fields2019

    • Author(s)
      Kazuya Miyagawa, Matsuno Manabu, Michihiro Hirata, Tamura Masafumi, and Kazushi Kanoda
    • Organizer
      APS March Meeting 2019
    • Related Report
      2018 Research-status Report
  • [Presentation] Symmetry breaking of spin and valley degree of freedom in an organic massless-Dirac system, a-(BEDT-TTF)2I3 under magnetic field2018

    • Author(s)
      K. Miyagawa, M. Matsuno, T. Taniguchi, D. Liu, M. Hirata, M. Tamura, K. Kanoda
    • Organizer
      International Conference on Magnetism 2018 (ICM2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 13C NMR Study on Charge Ordered Insulator, q-(BEDT-TTF)2TlCo(SCN)42018

    • Author(s)
      Kazuya Miyagawa, Takuro Sato, Himuro Hashimoto, Akira Ueda, Hatsumi Mori, Kazushi Kanoda
    • Organizer
      APS Mach Meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Magnetism and Superconductivity of Organic Triangular Lattice System2017

    • Author(s)
      K. Miyagawa
    • Organizer
      The 12th International Symposium on Crystalline Organic Metals, Superconductors and Magnets (ISCOM2017)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 13C NMR Study on Organic Triangular Lattice Systems, k-(BEDT-TTF)2Cu2(CN)3 and k-(BEDT-TTF)4Hg2.89Br82017

    • Author(s)
      Kazuya Miyagawa, Hiroshi Ooike, Hiromi Taniguchi, Kazushi Kanoda
    • Organizer
      International Conference on Strongly Correlated Electron Systems(SCES 2017)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 13C NMR によるα-(BEDT-TTF)2I3の低温磁性2017

    • Author(s)
      宮川和也, 稲垣雄介, 加藤直也, 田村雅史, 鹿野田一司
    • Organizer
      日本物理学会 2017年秋季大会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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