Topological Descendants of Multicritical EuTl<sub>2</sub>

ORAL

Abstract

Aided by a refined understanding of topological band structures with crystalline symmetries that has emerged recently, many electronic phases have been identified and a plethora of materials have been predicted to host novel properties and functionalities. Here we describe a paradigmatic semimetal that simultaneously incorporates multiple, and sometimes conflicting topology which guarantees gaplessness and leads to an exceptionally rich family of descendent phases on lowering symmetry. We predict that this multicritical phase is realized in EuTl2. Starting from the parent semimetallic state, which already separates two topological insulating regimes, the interplay of inherent magnetism and strain allows for an exceptionally rich phase diagram of topological descendant states.

*Work supported by the Center for Advancement of Topological Semimetals, an Energy Frontier Research Center funded by the U.S. DOE Office of Science, BES, through Ames Laboratory under Contract No. DE-AC02-07CH11358. R.-J. S. in addition acknowledges Marie Sklodowska-Curie programme [EC Grant No. 842901] and Winton programme as well as Trinity College at Cambridge. H.C.P. acknowledges Pappalardo Fellowship at MIT and Croucher Foundation Fellowship.

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Presenters

  • Lin-Lin Wang

    • Ames Laboratory
    • Ames Laboratory/Iowa State University
    • Department of Physics and Astronomy, Ames Laboratory, Iowa State University
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory

Authors

  • Lin-Lin Wang

    • Ames Laboratory
    • Ames Laboratory/Iowa State University
    • Department of Physics and Astronomy, Ames Laboratory, Iowa State University
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory

  • Hoi Chun Po

    • Department of Physics, MIT
    • Massachusetts Institute of Technology

  • Robert-Jan Slager

    • University of Cambridge
    • TCM Group, Cavendish Laboratory, University of Cambridge
    • TCM Group, Cavendish Laboratory/ Department of Physics, University of Cambridge/ Harvard University
    • Harvard University

  • Ashvin Vishwanath

    • Harvard University
    • Department of Physics, Harvard University
    • Department of Physics and Astronomy, Harvard University
    • Department of Physics, Harvard university