Dome-shaped superconducting behavior of Weyl semimetal Mo<sub>0.50</sub>W<sub>0.50</sub>Te<sub>2</sub> under pressure

ORAL

Abstract

Systematic high-pressure studies have been carried out on the type-II Weyl semimetal candidate Mo0.50W0.50Te2 using a diamond anvil cell in order to determine the effects of pressure on its magnetotransport properties. Superconductivity was successfully induced under 1.1 GPa with a superconducting transition temperature (Tc) of 2.6 K. Tc was found to continuously increase with increasing pressure, reaching a maximum value of 5.8 K under 14.3 GPa. With further increasing pressure above 14.3 GPa, the Tc remains constant and then begins to decrease at 17.5 GPa. The dome-shaped Tc - P phase diagram was mapped out for pressure up to 42 GPa. Under pressure, the magnetoresistance of Mo0.50W0.50Te2 is suppressed and its Hall coefficient changes sign. Details of the above results will be discussed.

*The work is supported by US Air Force Office of Scientific Research Grant FA9550-15-1-0236 and FA9550-20-1-0068, the T. L. L. Temple Foundation, the John J. and Rebecca Moores Endowment, and the State of Texas through the Texas Center for Superconductivity at the University of Houston.

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Presenters

  • Rabin Dahal

    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204, USA

Authors

  • Rabin Dahal

    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204, USA

  • Liangzi Deng

    • University of Houston
    • Texas Center for Superconductivity, University of Houston
    • Texas Center for Superconductivity & Physics Department at University of Houston
    • University of Houston, Texas Center for Superconductivity
    • Texas Center of Superconductivity and Physics Department at the University of Houston
    • TcSUH and Dept of Physics, University of Houston
    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204, USA
    • Texas Center for Superconductivity and Department of Physics, University of Houston

  • Narayan Poudel

    • Nuclear Materials Department, Idaho National Laboratory
    • Idaho National Laboratory
    • Idaho National Laboratory, Idaho Falls, Idaho 83415, USA
    • Texas Center for Superconductivity and Department of Physics, University of Houston

  • Melissa Gooch

    • University of Houston
    • TcSUH and Dept of Physics, University of Houston
    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204, USA
    • Texas Center for Superconductivity and Department of Physics, University of Houston

  • Zheng Wu

    • University of Houston
    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204, USA
    • Texas Center for Superconductivity and Department of Physics, University of Houston

  • Paul C. W. Chu

    • University of Houston
    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204, USA
    • Texas Center for Superconductivity and Department of Physics, University of Houston