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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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