Tunable Topological Materials from First Principles

ORAL

Abstract

The control of topological phases is the next step to harnessing their exotic electronic and transport properties. A promising route to achieving tunability is via a subclass of polar compounds that can be continuously deformed from a nonpolar reference phase via strain, pressure or chemical substitution. Using first-principles calculations we propose new polar topological materials which have been downselected from a high-throughput search for potential ferroelectrics. These compounds possess Dirac and Weyl nodes at or near the Fermi level. We investigate the capacity to induce and alter the topological properties in these materials by tuning with epitaxial strain, pressure and chemistry.

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Presenters

  • Sophie Weber

    Univ of California - Berkeley

Authors

  • Sophie Weber

    Univ of California - Berkeley

  • Sinead Griffin

    Univ of California - Berkeley

  • Jeffrey Neaton

    Molecular Foundry, Lawrence Berkeley National Laboratory; Department of Physics, University of California, Berkeley; Kavli Energy Nanosciences Institute at Berkeley, Physics, University of California, Berkeley; Lawrence Berkeley National Laboratory, Department of Physics, University of California, Univ of California - Berkeley, Lawrence Berkeley Natl Lab, Materials Science Division, Lawrence Berkeley National Laboratory, Molecular Foundry, Lawrence Berkeley National Lab, Physics, University of California, Berkeley, Department of Physics UCB; Molecular Foundry LBNL; Kavli ENSI, Lawrence Berkeley National Laboratory, Department of Physics, Univ of California - Berkeley, Lawrence Berkeley National Lab and University of California - Berkeley