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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.

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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