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Pressure-induced superconductivity in novel polymorphic phase of BaCu<sub>2</sub>As<sub>2 </sub>(Z=10)

ORAL

Abstract

High-pressure electrical transport studies up to 60 GPa have been conducted on a completely new polymorphic phase of BaCu2As2 (β-BaCu2As2), in which the number of formula units Z is 10. A superconducting phase was detected at pressure above 19 GPa with the highest Tc of 7.2 K observed at 24 GPa. Two additional superconducting phases were also observed at a lower pressure range, but their respective pressure dependences are very similar to those of superconducting phases in elemental Sn, which served as the flux for growing the single-crystal β-BaCu2As2. Our high-pressure electrical transport measurements of Sn show that no new superconducting phase exists at pressure above 19 GPa and other known possible superconducting impurities are excluded as well.

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Presenters

  • 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

Authors

  • 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

  • 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

  • Shuyuan Huyan

    University of Houston, 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

  • Hanlin Wu

    Department of Physics, University of Texas at Dallas, Physics, The University of Texas at Dallas, Department of Physics, The University of Texas at Dallas

  • Sheng Li

    Department of Physics, University of Texas at Dallas, Physics, The University of Texas at Dallas, Department of Physics, The University of Texas at Dallas

  • Bing Lv

    The University of Texas at Dallas, Department of Physics, University of Texas at Dallas, Physics, The University of Texas at Dallas, Department of Physics, The University of Texas at Dallas, University of Texas at Dallas