High Field Magnetotransport in Superconducting Hydrides under Pressure

ORAL

Abstract

Hydrogen sulfide forms metallic phase under high pressure above one million atmospheres and becomes superconducting at temperatures as high as 203K at 160GPa. Despite record-breaking Tc the basic properties of superconducting sulphur hydride/deuteride are found to be consistent with conventional Bardeen-Cooper-Schrieffer (BCS) theory. Early measurements of the superconducting phase diagram in magnetic fields up to 7T estimate upper critical fields of the order of 70T. We report magnetotransport studies of superconducting sulphur hydride in DC fields up to 35T and pulsed fields up to 65T. We find that upper critical field generally follow the Werthamer, Helfand and Hohenberg (WHH) formalism at low fields, while noticeable deviations from WHH appear at experimental limit of 65T.

*The work at NHMFL was supported by the National Science foundation under cooperative Grant Nos. DMR-1157490 and DMR-1644779, the U.S. DOE, and the State of Florida, and DoE-BES DE-SC0002613

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Presenters

  • Fedor Balakirev

    • Los Alamos National Laboratory
    • Los Alamos National Labs
    • Los Alamos, National High Magnetic Field Laboratory
    • National High Magnetic Field Lab, Los Alamos National Laboratory, Los Alamos, USA
    • National High Magnetic Field Laboratory

Authors

  • Shirin Mozaffari

    • National High Magnetic Field Laboratory
    • National High Magnetic Field Lab, Florida State University, Tallahassee, USA

  • Luis Balicas

    • National High Magnetic Field Laboratory, Tallahassee, FL-32310, USA.
    • National High Magnetic Field Laboratory
    • National High Magnetic Field Laboratory FSU
    • National High Magnetic Field Lab, Florida State University, Tallahassee, USA
    • NHMFL

  • Vasily S. Minkov

    • Max-Planck-Institut fur Chemie, Hahn-Meitner-Weg 1, 55128 Mainz, Germany

  • Dmitry Knyazev

    • Max-Planck-Institut fur Chemie, Hahn-Meitner-Weg 1, 55128 Mainz, Germany

  • Mikhail Eremets

    • Max-Planck-Institut fur Chemie, Hahn-Meitner-Weg 1, 55128 Mainz, Germany

  • Mari Einaga

    • Osaka University, Machikaneyamacho 1-3, Toyonaka, Osaka, 560-8531, Japan

  • Katsuya Shimizu

    • Osaka University, Machikaneyamacho 1-3, Toyonaka, Osaka, 560-8531, Japan

  • Dan Sun

    • Los Alamos National Laboratory
    • National High Magnetic Field Lab, Los Alamos National Laboratory, Los Alamos, USA

  • Fedor Balakirev

    • Los Alamos National Laboratory
    • Los Alamos National Labs
    • Los Alamos, National High Magnetic Field Laboratory
    • National High Magnetic Field Lab, Los Alamos National Laboratory, Los Alamos, USA
    • National High Magnetic Field Laboratory