Title:
Hinge states of second-order topological insulators as a Mach-Zehnder interferometer
Author(s):
Chaou, Adam Yanis; Brouwer, Piet W.; Sedlmayr, Nicholas
Year of publication:
2023
Available Date:
2024-04-18T09:56:40Z
Abstract:
Three-dimensional higher-order topological insulators can have topologically protected chiral modes propagating on their hinges. Hinges with two copropagating chiral modes can serve as a “beam splitter” between hinges with only a single chiral mode. Here we show how such a crystal, with Ohmic contacts attached to its hinges, can be used to realize a Mach-Zehnder interferometer. We present concrete calculations for a lattice model of a first-order topological insulator in a magnetic field, which, for a suitable choice of parameters, is an extrinsic second-order topological insulator with the required configuration of chiral hinge modes.
Part of Identifier:
ISSN (print): 2469-9950
e-ISSN (online): 2469-9969
Keywords:
Edge states
Quantum interference effects
Symmetry protected topological states
Topological insulators
DDC-Classification:
539 Moderne Physik
Publication Type:
Wissenschaftlicher Artikel
URL of the Original Publication:
DOI of the Original Publication:
Journal Volume:
107 (2023)
Journaltitle:
Physical Review B
Publisher:
American Physical Society
Publisher Place:
College Park, MD
Department/institution:
Physik
Institut für Theoretische Physik