Elastic backscattering of quantum spin Hall edge modes from Coulomb interactions with nonmagnetic impurities

Volume: 103, Issue: 23, Pages: 235164
Published: Jun 28, 2021
Abstract
We demonstrate that electrostatic interactions between helical electrons at the edge of a quantum spin Hall insulator and a dynamical impurity can induce quasielastic backscattering. Modeling the impurity as a two-level system, we show that transitions between counterpropagating Kramers-degenerate electronic states can occur without breaking time-reversal symmetry, provided that the impurity also undergoes a transition. The associated electrical...
Paper Details
Title
Elastic backscattering of quantum spin Hall edge modes from Coulomb interactions with nonmagnetic impurities
Published Date
Jun 28, 2021
Volume
103
Issue
23
Pages
235164
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