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Modular Arithmetic with Nodal Lines: Drumhead Surface States in ZrSiTe

ORAL

Abstract

We study the electronic structure of the nodal line semimetal ZrSiTe both experimentally and theoretically.
We find two different surface states in ZrSiTe - topological drumhead surface states and trivial floating band surface states, which can be easily distinguished in ARPES experiments. Using the spectra of Wilson loops, we show that a non-trivial Berry phase that exist in a confined region within the Brillouin Zone gives rise to the topological drumhead-type surface states. The Z2 structure of the Berry phase induces a Z2 'modular arithmetic' of the surface states, allowing surface states deriving from different nodal lines to hybridize and gap out, which can be probed by a set of Wilson loops. Our findings are confirmed by ab-initio calculations and angle-resolved photoemission experiments, which are in excellent agreement with each other and the topological analysis.
Ref: arXiv:1909.02154

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Presenters

  • Lukas Muechler

    Center for Computational Quantum Physics, Flatiron Institute, 162 5th Avenue, New York, New York 10010, USA, Center for Computational Quantum Physics, Flatiron Institute, Center for Computational Quantum Physics, The Flatiron Institute

Authors

  • Lukas Muechler

    Center for Computational Quantum Physics, Flatiron Institute, 162 5th Avenue, New York, New York 10010, USA, Center for Computational Quantum Physics, Flatiron Institute, Center for Computational Quantum Physics, The Flatiron Institute

  • Andreas Topp

    MPI for solid state research, Max Planck Institute for Solid State Research

  • Raquel Queiroz

    Weizmann Institute of Science, Department of Condensed Matter Physics, Weizmann Institute of Science

  • Maxim Krivenkov

    Helmholtz-Zentrum Berlin, Helmholtz-Zentrum Berlin fuer Materialien und Energie

  • Andrei Varykhalov

    Helmholtz-Zentrum Berlin, Helmholtz-Zentrum Berlin fuer Materialien und Energie

  • Jennifer Cano

    Center for Computational Quantum Physics, Flatiron Institute, Department of Physics and Astronomy, Stony Brook University, Stony Brook University

  • Christian R Ast

    MPI for solid state research, Max Planck Institute for Solid State Research

  • Leslie Schoop

    Princeton University, Department of Chemistry, Princeton University, Princeton