Superconducting properties of purely distorted transition metal dichalcogenides

ORAL

Abstract

The distorted phases (such as 2M) of transition metal dichalcogenides (TMDCs) exhibit exotic physical properties, such as superconductivity, topological energy gap, and Majorana bound states [1-2]. However, because the distorted phases are metastable and they usually appear in domains within their thermodynamically stable counterpart, transport experiments of these phases have been limited. Here we present a TMDC with a purely distorted phase that features unconventional superconductivity with an extremely anisotropic upper critical field. Remarkably, the critical field along the in-plane direction violates the well-established Pauli limit. We find that this superconductor shows a surprisingly large critical current density, which is two orders of magnitude higher than that in typical two-dimensional superconductors. Our work provides a promising route to understand the nature of superconductivity in distorted TMDCs.

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Presenters

  • Qi Zhang

    • Princeton University

Authors

  • Qi Zhang

    • Princeton University

  • Md. Shafayat Hossain

    • Princeton University

  • Brian W Casas

    • National High Magnetic Field Laboratory

  • Wenkai Zheng

    • National High Magnetic Field Laboratory

  • Guoqing Chang

    • Nanyang Technological University
    • Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University

  • Zhuangchai Lai

    • Department of Chemistry, City University of Hong Kong, Hong Kong SAR, China

  • Zijia Cheng

    • Princeton University
    • Laboratory for Topological Quantum Matter and Advanced Spectroscopy (B7), Department of Physics, Princeton University, Princeton, New Jersey, USA.

  • Yuxiao Jiang

    • Princeton University

  • Jiaxin Yin

    • Princeton University
    • Department of Physics, Princeton University

  • Nana Shumiya

    • Princeton University

  • Maksim Litskevich

    • Princeton University

  • Tyler A Cochran

    • Princeton University

  • Xian Yang

    • Princeton University

  • Daniel Multer

    • Princeton University

  • Hua Zhang

    • Department of Chemistry, City University of Hong Kong, Hong Kong SAR, China

  • Luis Balicas

    • National High Magnetic Field Laboratory

  • Zahid M Hasan

    • Princeton University
    • Laboratory for Topological Quantum Matter and Advanced Spectroscopy (B7), Department of Physics, Princeton University, Princeton, New Jersey, USA.