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High Pressure study of low-Z superconductor Be<sub>22</sub>Re

ORAL

Abstract

With Tc ∼9.6 K, Be22Re exhibits one of the highest critical temperatures among Be-rich compounds. We have carried out a series of high pressure electrical resistivity measurements to 30 GPa. The data show that the critical temperature Tc is suppressed gradually at a rate of dTc/dP = –0.05 K/GPa. Density functional theory calculations demonstrate a corresponding increase in the density of states at the Fermi level. Together, these results indicate that the electron-phonon coupling decreases with pressure. We discuss the relationship between low-Z Be-rich superconductors and the high-Tc superhydrides.

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Presenters

  • Jinhyuk Lim

    Department of Physics, University of Florida

Authors

  • Jinhyuk Lim

    Department of Physics, University of Florida

  • Ajinkya Hire

    Department of Materials Science and Engineering, University of Florida

  • Yundi Quan

    Physics Department, University of Florida, Department of Physics, University of Florida, University of California, Davis

  • Jungsoo Kim

    University of Florida, Department of Physics, University of Florida

  • Laura Fanfarillo

    Department of Physics, University of Florida, Physics, University of Florida

  • Stephen Raymond Xie

    Department of Materials Science and Engineering, University of Florida, Materials Science and Engineering, University of Florida

  • ravhi kumar

    Department of Physics, University of Illinois at Chicago, University of Illinois at Chicago

  • Russell Hemley

    Department of Chemistry, University of Illinois at Chicago

  • Richard Hennig

    University of Florida, Department of Materials Science and Engineering, University of Florida, Materials Science and Engineering, University of Florida

  • Peter Hirschfeld

    University of Florida, Department of Physics, University of Florida, Physics, University of Florida, univ of Florida

  • Gregory Randall Stewart

    University of Florida, Department of Physics, University of Florida

  • James Hamlin

    Department of Physics, University of Florida, University of Florida