Multi-gap superconductivity in the ternary compound SrPt<sub>10</sub>P<sub>4</sub> with complex new structure

ORAL

Abstract

We report superconductivity at 1.4 K in the new ternary compound SrPt10P4 with a complex new structure. The compound crystallizes in a monoclinic space-group C2/c (#15) with lattice parameters a= 22.9151(9)Å, b= 13.1664(5)Å, c=13.4131(5) Å, and β= 90.0270(5)°. Bulk superconductivity in the sample has been clearly demonstrated through resistivity, ac susceptibility, and heat capacity measurements. Detail specific heat analysis suggests rather weak electron-phonon coupling (ΔCel/ γnTc ~1.02) and multiple gap feature in this compound. High pressure measurements have shown that the superconducting Tc is systematically suppressed upon application of pressure, with a dTc/dP coefficient of -0.016 K/GPa.

*Air Force Office of Scientific Research (AFOSR)

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Presenters

  • Bing Lv

    • University of Texas at Dallas
    • Department of Physics, University of Texas at Dallas
    • Univ of Texas, Dallas
    • Dept. of Physics, The University of Texas at Dallas
    • Department of Physcis, University of Texas at Dallas

Authors

  • Bing Lv

    • University of Texas at Dallas
    • Department of Physics, University of Texas at Dallas
    • Univ of Texas, Dallas
    • Dept. of Physics, The University of Texas at Dallas
    • Department of Physcis, University of Texas at Dallas

  • Ben Jawdat

    • Air Force Research Laboratory

  • Zheng Wu

    • Department of Physics and Texas Center for Superconductivity, University of Houston
    • TcSUH and Dept. of Physics, University of Houston
    • Department of Physics and Texas Center for Superconductivity at University of Houston

  • Sheng Li

    • Univ of Texas, Dallas
    • Dept. of Physics, The University of Texas at Dallas
    • Department of Physcis, University of Texas at Dallas

  • Paul C. W. Chu

    • University of Houston
    • TcSUH and Dept. of Physics, University of Houston
    • Texas Center for Superconductivity at the University of Houston