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Exotic excitations and anomalous transport phenomena in quantum spin liquids

Research Project

Project/Area Number 17K05517
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Condensed matter physics II
Research InstitutionOsaka University

Principal Investigator

Fujimoto Satoshi  大阪大学, 基礎工学研究科, 教授 (10263063)

Project Period (FY) 2017-04-01 – 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: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords磁性 / マヨラナ粒子 / 量子スピン / スピン液体 / エニオン / トポロジカル物質 / キタエフ・モデル / トポロジカル相 / 熱ホール効果 / スピン流 / 超伝導 / スピントルク / トポロジカル励起 / 物性理論 / 強相関電子系
Outline of Final Research Achievements

In this research project, novel quantum phenomena associated with Majorana particles in the Kitaev spin liquid state are theoretically explored. In contrast to conventional magnets, Kitaev magnets do not show magnetic order even at zero temperature, and moreover, in the spin liquid state, a Majorana particle emerges from the fractionalization of an electron, and has only a half degrees of freedom of an electron. The Majorana particles in solid state materials are important, and attracting much attention, because they can be applied to quantum computation. We have clarified that non-Kitaev interactions, which exist in real candidate materials of Kitaev magnets, drasticallt change properties of Majorana particles, inducing novel topological quantum phenomena.

Academic Significance and Societal Importance of the Research Achievements

キタエフ磁性体で実現が期待されるマヨラナ粒子状態は、近未来の量子情報への応用の観点から国内外で非常に興味が持たれ、活発に研究がされている。本研究で明らかになった新しいマヨラナ粒子の性質である、マヨラナ・フェルミ面やトポロジカル相転移は、将来の候補物質におけるマヨラナ粒子の実験探索に利用できると期待される。さらに本研究で新たに分かったマヨラナ粒子の性質を用いて、マヨラナ粒子を制御して、量子計算に応用する新しい方法の開発にも利用できる可能性がある。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (26 results)

All 2021 2020 2019 2018 2017 Other

All Int'l Joint Research (2 results) Journal Article (12 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 12 results,  Open Access: 2 results) Presentation (12 results) (of which Int'l Joint Research: 9 results,  Invited: 7 results)

  • [Int'l Joint Research] Northwestern University(米国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] University of British Columbia(カナダ)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Paramagnetic Effects of j-electron Superconductivity and Application to UTe22021

    • Author(s)
      Hiranuma Kozo、Fujimoto Satoshi
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 90 Issue: 3 Pages: 034707-034707

    • DOI

      10.7566/jpsj.90.034707

    • NAID

      40022510395

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ab initio simulation of non-Abelian braiding statistics in topological superconductors2021

    • Author(s)
      T. Sanno, S. Miyazaki, T. Mizushima, S. Fujimoto
    • Journal Title

      Physical Review B

      Volume: 103 Issue: 5 Pages: 054504-054504

    • DOI

      10.1103/physrevb.103.054504

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Topological phase transition to Abelian anyon phases due to off-diagonal exchange interaction in the Kitaev spin liquid state2020

    • Author(s)
      Takikawa Daichi、Fujimoto Satoshi
    • Journal Title

      Physical Review B

      Volume: 102 Issue: 17 Pages: 1-10

    • DOI

      10.1103/physrevb.102.174414

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Topological piezoelectric effect and parity anomaly in nodal line semimetals2020

    • Author(s)
      Matsushita Taiki、Fujimoto Satoshi、Schnyder Andreas P.
    • Journal Title

      Physical Review Research

      Volume: 2 Issue: 4 Pages: 1-8

    • DOI

      10.1103/physrevresearch.2.043311

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Impact of off-diagonal exchange interactions on the Kitaev spin-liquid state of α-RuCl32019

    • Author(s)
      Takikawa Daichi、Fujimoto Satoshi
    • Journal Title

      Physical Review B

      Volume: 99 Issue: 22

    • DOI

      10.1103/physrevb.99.224409

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Chiral Higgs Mode in Nematic Superconductors2019

    • Author(s)
      Uematsu Hiroki、Mizushima Takeshi、Tsuruta Atsushi、Fujimoto Satoshi、Sauls J.?A.
    • Journal Title

      Physical Review Letters

      Volume: 123 Issue: 23

    • DOI

      10.1103/physrevlett.123.237001

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Disorder-induced exceptional and hybrid point rings in Weyl/Dirac semimetals2019

    • Author(s)
      Matsushita Taiki、Nagai Yuki、Fujimoto Satoshi
    • Journal Title

      Physical Review B

      Volume: 100 Issue: 24

    • DOI

      10.1103/physrevb.100.245205

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Torsional chiral magnetic effect due to skyrmion textures in a Weyl superfluid 3He-A2019

    • Author(s)
      Y. Ishihara, T. Mizushima, A. Tsuruta, and S. Fujimoto
    • Journal Title

      Phys. Rev. B

      Volume: 99 Issue: 2 Pages: 0245131-13

    • DOI

      10.1103/physrevb.99.024513

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Negative Thermal Magnetoresistivity as a Signature of Chiral Anomaly in Weyl Superconductors2018

    • Author(s)
      T. Kobayashi, T. Matsushita, T. Mizushima, A. Tsuruta, and S. Fujimoto
    • Journal Title

      Phys. Rev. Lett.

      Volume: 121 Issue: 20 Pages: 2070021-6

    • DOI

      10.1103/physrevlett.121.207002

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Charge/spin supercurrent and the Fulde-Ferrell state induced by crystal deformation in Weyl/Dirac superconductors2018

    • Author(s)
      T. Matsushita, T. Liu, T. Mizushima, and S. Fujimoto
    • Journal Title

      Physical Review B

      Volume: 97 Issue: 13 Pages: 1345191-11

    • DOI

      10.1103/physrevb.97.134519

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Quantum oscillations and Dirac-Landau levels in Weyl superconductors2017

    • Author(s)
      T. Liu, M. Franz, and S. Fujimoto
    • Journal Title

      Physical Review B

      Volume: 96 Issue: 22

    • DOI

      10.1103/physrevb.96.224518

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Adiabatic and nonadiabatic spin torques induced by a spin-triplet supercurrent2017

    • Author(s)
      R. Takashima, S. Fujimoto, and T. Yokoyama
    • Journal Title

      Physical Review B

      Volume: 96 Issue: 12

    • DOI

      10.1103/physrevb.96.121203

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] Topological quantum computation with Majorana fermion2020

    • Author(s)
      Satoshi Fujimoto
    • Organizer
      新世代研究所スピントロニクス研究会,新世代研究所, 東京
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Chiral anomaly Phenomena in Weyl superconductors2019

    • Author(s)
      Satoshi Fujimoto
    • Organizer
      Superstripes 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Impact of off-diagonal exchange interactions on the Kitaev spin-liquid state of α-RuCl32019

    • Author(s)
      Daichi Takikawa, Satoshi Fujimoto
    • Organizer
      3rd EPiQS-TMS Alliance Workshop on Topological Phenomena in Quantum Materials
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Chiral anomaly and chiral electromagnetism in Weyl/Dirac superconductors2018

    • Author(s)
      Satoshi Fujimoto
    • Organizer
      12th International Conference on Ceramic Materials and Components for Energy and Environmental Applications (CMCEE 2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Chiral anomaly and chiral electromagnetism in Weyl/Dirac superconductors2018

    • Author(s)
      Satoshi Fujimoto
    • Organizer
      Erice Workshop 2018 "Majorana Fermions and Topological Materials Science" (Erice, Sicily, Italy, 2018/Jul/21-27)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Nematicity and chirality in odd-parity superconductors with strong spin-orbit coupling2018

    • Author(s)
      Satoshi Fujiomto
    • Organizer
      International Workshop on j-fermion Physics and Materials
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Dynamics of Spin Textures and Weyl Quasiparticles in Superconductor-Magnet Heterostructures2018

    • Author(s)
      藤本聡
    • Organizer
      TMS-EPiQS 2nd Alliance Workshop: Topological Magnets and Topological Superconductors
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] トポロジカル超伝導とワイル/ディラック超伝導2018

    • Author(s)
      藤本聡
    • Organizer
      日本物理学会 第73回年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Weyl/Dirac系における超伝導磁気効果2018

    • Author(s)
      松下太樹、Tianyu Liu, 水島健、藤本聡
    • Organizer
      日本物理学会第73回年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Chiral anomaly phenomena induced by geomretical responses in Weyl semimetals and Weyl superconductors2018

    • Author(s)
      藤本聡
    • Organizer
      BEC2018(Variety and universality of bulk-edge correspondence in topological phases: From solid state physics to transdisciplinary concepts)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Chiral anomaly phenomena in Weyl superconductors2017

    • Author(s)
      藤本聡
    • Organizer
      Trends in theory of correlated material 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Geometrically-Induced Transport Phenomena in Weyl Semimetals and Weyl Superconductors2017

    • Author(s)
      藤本聡
    • Organizer
      WINDS2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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Published: 2017-04-28   Modified: 2022-01-27  

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