Pressure evolution of the low temperature crystal structure of superconducting Weyl semimetal candidate MoTe2

ORAL

Abstract

Orthorhombic MoTe2 has been proposed to be a type II Weyl semimetal. This classification is supported by the observation of rare topological phenomena such as Fermi arcs and Weyl nodes through ARPES measurements. Superconductivity is also observed in this material, with a drastic pressure enhancement of the superconducting transition temperature often associated with a first-order structural transition from the non-centrosymmetric orthorhombic phase to a centrosymmetric monoclinic phase with uncertain band topology. I will discuss the temperature-pressure structural phase diagram of this system as determined by neutron scattering at conditions relevant for superconductivity. I will also comment on possible implications of the structural evolution on the ground state electronic structure.

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Presenters

  • Colin Heikes

    NIST, National Institute of Standards and Technology, Department of Materials Science and Engineering, Cornell University

Authors

  • Colin Heikes

    NIST, National Institute of Standards and Technology, Department of Materials Science and Engineering, Cornell University

  • I-Lin Liu

    University of Maryland, College Park, Center for Nanoscale and Advanced Materials, University of Maryland, University of Maryland, College Park & NIST

  • Taner Yildirim

    National Institute of Standards and Technology

  • Nicholas Butch

    NIST Center for Neutron Research, Center for Neutron Research, National Institute of Standards and Technology, NIST, NIST Center for Neutron Research, National Institute of Standards and Technology, National Institute of Standards and Technology, University of Maryland, College Park & NIST

  • William Ratcliff

    NIST Center for Neutron Research, National Institute of Standards and Technology, National Institute of Standards and Technology, NIST Center for neutron research, National Institute of Standard and Technology, Gaithersburg, MD, NIST