Edge Dynamics in a Quantum Spin Hall State: Effects from Rashba Spin-Orbit Interaction

Stroem, Anders and Johannesson, Henrik and Japaridze, G.I. (2010) Edge Dynamics in a Quantum Spin Hall State: Effects from Rashba Spin-Orbit Interaction. Physical Review Letters, 104 (25). pp. 256804-1.

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Abstract

We analyze the dynamics of the helical edge modes of a quantum spin Hall state in the presence of a spatially non-uniform Rashba spin-orbit (SO) interaction. A randomly fluctuating Rashba SO coupling is found to open a scattering channel which causes localization of the edge modes for a weakly screened electron-electron (e-e) interaction. A periodic modulation of the SO coupling, with a wave number commensurate with the Fermi momentum, makes the edge insulating already at intermediate strengths of the e-e interaction. We discuss implications for experiments on edge state transport in a HgTe quantum well.

Item Type: Article
Subjects: Q Science > QC Physics
Divisions: Faculties/Schools > School of Natural Sciences and Engineering
Depositing User: გიორგი ჯაფარიძე
Date Deposited: 09 Feb 2014 11:57
Last Modified: 03 Apr 2015 06:37
URI: http://eprints.iliauni.edu.ge/id/eprint/936

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