Superconducting properties near structural instabilities in LaH<sub>10</sub>

ORAL

Abstract

The hydride superconductor LaH10 has a Tc ~250 K at 150 GPa. We measured the properties of the superconductor in the pulsed magnetic field, above and below the structure transition at 135 GPa, where a steep Tc jump happens. We established key superconducting quantities of LaH10 under high magnetic fields, including upper critical fields and coherence lengths. We find that the drop in the Femi velocity in LaH10 is consistent with the Brillouin zone changes induced by the structural transition and that there is a correlation between the superconductivity and the structure instability.

*The work performed at the National High Magnetic Field Laboratory is supported by the National Science Foundation Cooperative Agreement No. DMR-1644779, and the State of Florida. The synchrotron X-Ray diffraction data were collected at GeoSoilEnviro CARS (The University of Chicago, Sector 13), Advanced Photon Source (APS), Argonne National Laboratory (USA), under Contract No. DE-AC02-06CH11357. GeoSoilEnviro CARS is supported by the National Science Foundation-Earth Sciences (EAR-1634415) and Department of Energy-GeoSciences (DE-FG02-94ER14466).

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Presenters

  • Dan Sun

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

Authors

  • Dan Sun

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

  • Vasily S Minkov

    • Max-Planck Institut für Chemie

  • Shirin Mozaffari

    • National High Magnetic Field Laboratory, Florida State University
    • National High Magnetic Field Laboratory

  • Stella Chariton

    • Center for Advanced Radiation Sources, University of Chicago
    • GSECARS, University Of Chicago
    • University of Chicago
    • CARS, University of Chicago

  • Vitali B. Prakapenka

    • Center for Advanced Radiation Sources, University of Chicago
    • GSECARS, University Of Chicago
    • University of Chicago
    • CARS, University of Chicago
    • Center for Radiation Sources, University of Chicago

  • Mikhail Eremets

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

  • Luis Balicas

    • National High Magnetic Field Laboratory
    • National High Magnetic Field Laboratory, Florida State University
    • National High Magnetic Field Lab
    • Condensed Matter Science, National High Magnetic Field Laboratory

  • Fedor F Balakirev

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