Possible strongly correlated superconductivity in a copper-based metal-organic framework

ORAL

Abstract

Recently the copper(II) benzenehexathiolate coordination polymer [Cu3(C6S6)]n (Cu-BHT) attracts significant interests as the first superconductor in metal-organic frameworks (MOFs) with a superconducting transition temperature Tc ~ 250 mK. Since Cu-BHT has a perfect 2D Kagome structure formed by S = 1/2 spins of Cu2+, unconventional superconductivity related to quantum fluctuations is expected. Although we have already reported that our magnetic penetration depth measurements suggest unconventional superconductivity in Cu-BHT, fundamental superconducting and normal state properties, such as dimensionality, magnetism, and the Fermi energy, which are important to elucidate the superconducting mechanism, are still unrevealed. In this study, therefore, we measured the angle-resolved upper critical field, magnetoresistance, electron spin resonance (ESR), and optical conductivity. By comparing the ratio of Tc to the Fermi temperature with other unconventional superconductors, we revealed that Cu-BHT is possibly a member of strongly correlated electron systems.

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Presenters

  • Kota Ishihara

    • Department of Advanced Material Science, University of Tokyo

Authors

  • Kota Ishihara

    • Department of Advanced Material Science, University of Tokyo

  • Takaaki Takenaka

    • Univ of Tokyo
    • Department of Advanced Material Science, University of Tokyo

  • Kenichiro Hashimoto

    • Department of Advanced Materials Science, University of Tokyo
    • Department of Advanced Materials Science, The University of Tokyo
    • Department of Advanced Material Science, University of Tokyo

  • Yijie Miao

    • Department of Advanced Material Science, University of Tokyo

  • Kiyoshi Torizuka

    • Institute for Solid State Physics, University of Tokyo

  • Jun Gouchi

    • Institute for Solid State Physics, University of Tokyo
    • Institute for Solid State Physics, The University of Tokyo

  • Yoshiya Uwatoko

    • Institute for Solid State Physics, University of Tokyo
    • Institute for Solid State Physics, The University of Tokyo
    • Institute for Solid State Physics, Univ of Tokyo

  • Junto Tsurumi

    • Department of Advanced Material Science, University of Tokyo

  • Shun Watanabe

    • Department of Advanced Material Science, University of Tokyo

  • Jun Takeya

    • Department of Advanced Material Science, University of Tokyo

  • Takahiko Sasaki

    • Institute for Materials Research, Tohoku University

  • Xing Huang

    • Institute of Chemistry, Chinese Academy of Sciences

  • Wei Xu

    • Institute of Chemistry, Chinese Academy of Sciences

  • Daoben Zhu

    • Institute of Chemistry, Chinese Academy of Sciences

  • Na Su

    • Institute of Physics, Chinese Academy of Sciences

  • Jinguang Cheng

    • Chinese Academy of Sciences
    • Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
    • Chinese Academy of Sciences,Institute of Physics
    • Institute of Physics, Chinese Academy of Sciences

  • Takasada Shibauchi

    • Advanced Materials Science, University of Tokyo
    • Univ of Tokyo-Kashiwanoha
    • Department of Advanced Materials Science, University of Tokyo
    • Univ of Tokyo
    • Dept. Adv. Mat. Sci., Univ. Tokyo
    • Univ. of Tokyo
    • Department of Advanced Materials Science, The University of Tokyo
    • Department of Advanced Material Science, University of Tokyo