Boundary networks of helical or chiral edges induced by bulk topology

ORAL

Abstract

We introduce an effective edge network theory to characterize the boundary topology of coupled edge states generated from various types of topological insulators. Two examples studied are two-dimensional second-order topological insulators and three-dimensional topological fullerenes. As a consequence of bulk-edge correspondence, these edge networks can faithfully predict properties such as the energy and fractional charge related to the bound states (edge solitons) in the aforementioned systems, including several aspects that were previously complicated or obscure.

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Presenters

  • Yanqi Wang

    University of California, Berkeley

Authors

  • Yanqi Wang

    University of California, Berkeley

  • Joel Moore

    University of California, Berkeley, Department of Physics, University of California, Berkeley, California 94720, USA, University of California, Berkeley and Lawrence Berkeley National Laboratory, Physics, University of California, Berkeley, University of California, Berkeley, and Lawrence Berkeley National Laboratory