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New ternary lanthanum superhydrides under pressure

ORAL

Abstract

The discovery of room-temperature superconductivity in lanthanum superhydride LaH10 may be understood in terms of the stabilization of a dense hydrogen cage structure with doping of B or N. We report experimental results for La-Y-H, La-Al-H, La-Nd-H, and La-C-H ternary hydrides at megabar pressures. Structures are identified on the basis of x-ray diffraction measurements, along with measurements of Tc from electrical conductivity. In particular, a cubic carbon-doped lanthanum hydride (La1-nCnHx) has been identified at megabar pressures.

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Presenters

  • Abdul Haseeb Manayil Marathamkottil

    University of Illinois at Chicago

Authors

  • Abdul Haseeb Manayil Marathamkottil

    University of Illinois at Chicago

  • NILESH P SALKE

    University of Illinois Chicago

  • Muhtar Ahart

    University of Illinois at Chicago, Carnegie Inst of Washington, University of Illinois Chicago, Department of Physics, University of Illinois at Chicago

  • Yue Meng

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

  • Maddury Somayazulu

    Argonne National Laboratory, HPCAT, X-Ray Science Division, Argonne National Laboratory

  • Russell J Hemley

    University of Illinois at Chicago, University of Illinois Chicago, Departments of Physics, Chemistry, and Earth and Environmental Sciences, University of Illinois Chicago, Department of Physics and Chemistry, University of Illinois Chicago, 845, W. Taylor Street, Chicago, IL 60607, Departments of Physics, Chemistry, and Earth and Environmental Sciences, University of Illinois at Chicago