Topological Protection from Random Rashba Spin-Orbit Backscattering: Ballistic Transport in a Helical Luttinger Liquid
Author
Xie, Hong-Yi; Li, Heqiu; Chou, Yang-Zhi; Foster, Matthew S.
Date
2016Abstract
The combination of Rashba spin-orbit coupling and potential disorder induces a random current operator for the edge states of a 2D topological insulator. We prove that charge transport through such an edge is ballistic at any temperature, with or without Luttinger liquid interactions. The solution exploits a mapping to a spin 1/2 in a time-dependent field that preserves the projection along one randomly undulating component (integrable dynamics). Our result is exact and rules out random Rashba backscattering as a source of temperature-dependent transport, absent integrability-breaking terms.
Citation
Published Version
Type
Journal article
Publisher
Citable link to this page
https://hdl.handle.net/1911/94220Rights
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