期刊
PHYSICAL REVIEW LETTERS
卷 116, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.116.086603
关键词
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资金
- Welch Foundation [C-1809]
- Alfred P. Sloan Research Fellowship [BR2014-035]
- National Science Foundation [NSF PHY11-25915]
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.
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