Pressure effects on strained FeSe$_{0.5}$Te$_{0.5}$ thin films

ORAL

Abstract

FeSe is the simplest structure in the family of the iron pnictides, with a reported superconducting transition of 8K for the $\alpha$-PbO- type structure. With the substitution of Te for Se, FeSe$_{0.5}$Te$_{0.5}$, was found to have an increased superconducting transition up to 15.2 K. To investigate the strain effect on the superconducting properties of the FeSe$_{0.5}$Te$_{0.5}$, thin films were grown under different conditions. The Tc and the normal state properties show a correlation to the induced strain of the system. The application of external pressure resulted in an increase of T$_c$, but at different rates depending on the pre-existent strain in the system.

–

Authors

  • Melissa Gooch

    • Department of Physics and TcSUH at the University of Houston
    • Dept. of Physics and TcSUH, University of Houston

  • Bernd Lorenz

    • Department of Physics and TcSUH at the University of Houston
    • Department of Physics, TcSUH, University of Houston
    • Univ of Houston
    • TCSUH and Department of Physics, University of Houston, Houston, Texas 77024-5002, USA
    • Dept. of Physics and TcSUH, University of Houston

  • SunXiang Huang

    • Department of Physics and Astronomy at John Hopkins University

  • Chia-Ling Chien

    • Department of Physics and Astronomy at John Hopkins University

  • Paul C. W. Chu

    • Texas Center for Superconductivity at University of Houston and Department of Physics,Lawrence Berkeley National Laboratory
    • Department of Physics and TcSUH at the University of Houston; Lawrence Berkeley National Laboratory
    • Department of Physics, TcSUH, University of Houston and Lawrence Berkeley National Laboratory
    • Dept. of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5002
    • Univ of Houston
    • TCSUH and Department of Physics, University of Houston, Houston, Texas 77024-5002, USA
    • Department of Physics and TcSUH, University of Houston
    • Dept. of Physics and TcSUH, University of Houston
    • Texas Center for Superconductivity, University of Houston and Lawrence Berkeley National Laboratory