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Study of the FFLO State and the Anomalous Magnetic Order in CeCoIn5

Research Project

Project/Area Number 23540398
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

KUMAGAI KEN-ICHI  北海道大学, -, 名誉教授 (70029560)

Project Period (FY) 2011 – 2013
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2011: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords強相関系 / 超伝導 / 磁気秩序 / NMR / 強相関電子系 / 核磁気共鳴 / CeCoIn5 / 強相関電子
Research Abstract

To improve our understanding of how the exotic superconductivity and magnetism can interact in CeCoIn5, we measured 115In NMR and demonstrate the emergence of a spatially distributed normal quasiparticle region in the HL-phase in parallel field. The field evolution of the paramagnetic magnetization and low energy quasiparticle DOS can be described well by the order parameter associated with the nodal plane formation via the FFLO second order phase transition. The evolution of NMR spectra with respect to angle between external field and a-axis reveasl that the magnetic structure changes from the spatially-uniform to the spatially-modulated one. The exotic FFLO phase is suppressed with increasing the angle, and disappears for beyond 20 degree.
Our results provide strong evidence for the formation of the FFLO state via the second order phase transition and coexistence ot the static magnetic order and FFLO state.

Report

(4 results)
  • 2013 Annual Research Report   Final Research Report ( PDF )
  • 2012 Research-status Report
  • 2011 Research-status Report
  • Research Products

    (18 results)

All 2014 2013 2012 2011

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (16 results) (of which Invited: 4 results)

  • [Journal Article] Evolution of Paramagnetic Quasiparticle Excitations Emerged in the High-Field Superconducting Phase of CeCoIn52011

    • Author(s)
      K. Kumagai, H. Shishido, T. Shibauchim Y. Matsuda
    • Journal Title

      Phys. Rev. Lett

      Volume: 106

    • Related Report
      2013 Final Research Report
    • Peer Reviewed
  • [Journal Article] Evolution of Paramagnetic Quasiparticle Excitations Emarged in the High-Field Superconducting Phase of CeCoIn52011

    • Author(s)
      K. Kumagai, H. Shishido, T. Shibauchi, Y. Matsuda
    • Journal Title

      Phys. Rev. Letters

      Volume: 106

    • Related Report
      2011 Research-status Report
    • Peer Reviewed
  • [Presentation] NMR Study of the Interplay Between the Superconducting FFLO State and the Magnetic Order in CeCoIn52014

    • Author(s)
      K. Kumagai, H. Shishido, T. Shibauchi and Y. Matsuda
    • Organizer
      International Conference of Magnetism and Superconductivity (ICSM2014)
    • Place of Presentation
      Antalya, Turkey
    • Related Report
      2013 Final Research Report
  • [Presentation] NMR Study of the Magnetic Order in the FFLO State of CeCoIn52013

    • Author(s)
      K. Kumagai, H. Shishido, T. Shibauchi and Y. Matsuda
    • Organizer
      International Conference on "Quantum in Complex Matter(Superstripes 2013)
    • Place of Presentation
      Ischia, Italy
    • Related Report
      2013 Final Research Report
    • Invited
  • [Presentation] NMR Study of the Magnetic Order in the FFLO State of CeCoIn52013

    • Author(s)
      Ken-ichi Kumagai, Hiroaki Shishido, Takasada. Shibauchi and Yuji Matsuda
    • Organizer
      SUPERSTRIPES 2013
    • Place of Presentation
      Hotel Continental, Ischia, Italy
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] Spatially-Modulated Superconducting Gap in CeCoIn52012

    • Author(s)
      K. Kumagai, H. Shishido, T. Shibauchi and Y. Matsuda
    • Organizer
      International Conference of Magnetism and Superconductivity (ICSM 2012)
    • Place of Presentation
      Istanbul, Turkey
    • Related Report
      2013 Final Research Report
    • Invited
  • [Presentation] NMR Study of Magnetic Order and Spatially-Modulated Superconducting Gap in CeCoIn52012

    • Author(s)
      K. Kumagai, H. Shishido, T. Shibauchi and Y. Matsuda
    • Organizer
      2012 Materials & Mechanisms of Superconductivity Conference
    • Place of Presentation
      Artemis Marin Princess Hotel (Turkey)
    • Related Report
      2012 Research-status Report
  • [Presentation] NMR Study of Magnetic Order and the FFLO state in CeCoIn52012

    • Author(s)
      K. Kumagai, H. Shishido, T. Shibauchi and Y. Matsuda
    • Organizer
      The 19th International Conference on Magnetism
    • Place of Presentation
      釜山コンベンションセンター(Korea)
    • Related Report
      2012 Research-status Report
  • [Presentation] NMR Study of Filed Induced Magnetic Order in the FFLO phase of CeCoIn52012

    • Author(s)
      K. Kumagai, H. Shishido, T. Shibauchi and Y. Matsuda
    • Organizer
      Materials & Mechanisms of Superconductivity Conference
    • Place of Presentation
      Omni Shoreham Hotel (USA)
    • Related Report
      2012 Research-status Report
  • [Presentation] NMR Study of Magnetic Order and the FFLO State in CeCoIn52011

    • Author(s)
      K. Kumagai
    • Organizer
      新学術領域研究「重い電子系の形成と秩序化」ワークショップ
    • Place of Presentation
      新潟大学
    • Related Report
      2013 Final Research Report
    • Invited
  • [Presentation] NMR Study of Magnetic Order and Spatially-Modulated Superconducting Gap in CeCoIn52011

    • Author(s)
      K. Kumagai, H. Shishido, T. Shibauchi and Y. Matsuda
    • Organizer
      A special session on the application of μSR, NMR and LTXRD etc in condensed matter, Fall Meeting of Chinese Physical Society (CPS)
    • Place of Presentation
      Hangzhou, China
    • Related Report
      2013 Final Research Report
  • [Presentation] Field Evolution of the FFLO State and Magnetism in CeCoIn52011

    • Author(s)
      K. Kumagai, H. Shishido, T. Shibauchi and Y. Matsuda
    • Organizer
      International Conference on Ultra Low Temperature Physics (ULT 2011)
    • Place of Presentation
      KAIST, Daejeon, Republic of Korea
    • Related Report
      2013 Final Research Report
  • [Presentation] 27 Al- and 95Mo-NMR Study on Noncentrosymmetric Superconductor Mo3A2C2011

    • Author(s)
      K. Kumagai, H. Shishido, T. Shibauchi and Y. Matsuda
    • Organizer
      The 26th International Conference on Low Temperature Physics (LT26)
    • Place of Presentation
      Beijing, Chaina
    • Related Report
      2013 Final Research Report
  • [Presentation] NMR Study of the FFLO State and Magnetism in CeCoIn52011

    • Author(s)
      K. Kumagai, H. Shishido, T. Shibauchi and Y. Matsuda
    • Organizer
      The 26th International Conference on Low Temperature Physics, (LT26)
    • Place of Presentation
      Beijing, Chaina
    • Related Report
      2013 Final Research Report
  • [Presentation] NMR Study of Magnetic Order and Spatially-Modulated Superconducting Gap in CeCoIn52011

    • Author(s)
      K. Kumagai, H. Shishido, T. Shibauchi and Y. Matsuda
    • Organizer
      International Conference of Strongly Correlated Electron Systems (SCES)
    • Place of Presentation
      Cambridge, UK
    • Related Report
      2013 Final Research Report
  • [Presentation] NMR Study of Magnetic Order and Spacially Modulated Superconducting Gap in CeCoIn52011

    • Author(s)
      K. Kumagai
    • Organizer
      International Conference of Strongly Correlated Electron Systems
    • Place of Presentation
      ケンブリッジ大学、(英国)
    • Related Report
      2011 Research-status Report
  • [Presentation] Field Evolution of the FFLO State and Magnetism in CeCoIn52011

    • Author(s)
      K. Kumagai, H. Shishido, T. Shibauchi and Y. Matsuda
    • Organizer
      International Conference on Ultra Low Temperature Physics(招待講演)
    • Place of Presentation
      KAIST 太田、(韓国)
    • Related Report
      2011 Research-status Report
  • [Presentation] NMR Study of Magnetic Order and Spatially-Modulated Superconducting Gap in CeCoIn52011

    • Author(s)
      K. Kumagai,
    • Organizer
      A special session in Fall Meeting of Chinese Physical Society(招待講演)
    • Place of Presentation
      浙江大学、(中国)
    • Related Report
      2011 Research-status Report

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Published: 2011-08-05   Modified: 2020-05-15  

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