High-pressure studies of lanthanum-yttrium ternary superhydrides

ORAL

Abstract

The discovery of near room temperature superconductivity in LaH10 and YH9 confirmed the theoretical predictions that these hydrogen-rich metal hydrides are superconductors with critical temperature Tc in the vicinity of room temperature. Recent experimental and theoretical results for ternary hydrides have opened further investigations of room-temperature superconductivity, including optimizing doping in La-based hydrides. In this study, the hydrogen-rich lanthanum-yttrium ternary hydrides (La1-nYnHx) were synthesized using ammonia borane (NH3BH3) as the hydrogen source. The results include documenting ~10% yttrium doped lanthanum superhydrides at 165 GPa by pulsed laser heating. Powder x-ray diffraction of the laser-heated samples has been used to confirm the formation of La-Y superhydrides.

*US NSF (DMR-1933622) & DOE/NNSA (DE-NA0003975)

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Presenters

  • Abdul Haseeb Manayil Marathamkottil

    • University of Illinois Chicago

Authors

  • Abdul Haseeb Manayil Marathamkottil

    • University of Illinois Chicago

  • Nilesh P Salke

    • University of Illinois Chicago
    • Department of Physics, University of Illinois Chicago, Chicago, USA

  • Muhetaer Aihaiti

    • University of Illinois Chicago
    • Carnegie Inst of Washington
    • Department of Physics, University of Illinois at Chicago, Chicago, IL 60607, USA
    • University of Illinois at Chicago, USA

  • Ravhi S Kumar

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

  • Yue Meng

    • HPCAT, X-ray Science Division, Argonne National Laboratory
    • Argonne National Laboratory

  • Maddury S Somayazulu

    • HPCAT, X-ray Science Division, Argonne National Laboratory
    • Argonne National Laboratory

  • Stella Chariton

    • Center for Advanced Radiation Sources, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637, USA
    • Center for Advanced Radiation Sources, University of Chicago
    • University of Chicago
    • GSECARS, Advanced Photon Source, Argonne National Laboratory

  • Vitali B Prakapenka

    • Center for Advanced Radiation Sources, University of Chicago
    • University of Chicago
    • Center for Advanced Radiation Sources, University of Chicago, Chicago, IL 60439, USA
    • GSECARS, Advanced Photon Source, Argonne National Laboratory

  • Russell J Hemley

    • University of Illinois Chicago
    • University of Illinois at Chicago
    • George Washington Univ
    • Departments of Physics and Chemistry, University of Illinois at Chicago
    • Department of Physics, University of Illinois at Chicago, Chicago, IL 60607, USA; Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA
    • Department of Physics, University of Illinois Chicago, Chicago, USA
    • University of Illinois at Chicago, USA