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Inelastic electron Backscattering in a generic helical edge channel

Schmidt, Thomas and Rachel, Stephan and von Oppen, Felix and Glazman, Leonid (2012) Inelastic electron Backscattering in a generic helical edge channel. Physical Review Letters, 108 (15). ISSN 0031-9007

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    Abstract

    We evaluate the low-temperature conductance of a weakly interacting one-dimensional helical liquid without axial spin symmetry. The lack of that symmetry allows for inelastic backscattering of a single electron, accompanied by forward scattering of another. This joint effect of weak interactions and potential scattering off impurities results in a temperature-dependent deviation from the quantized conductance, delta G proportional to T-4. In addition, delta G is sensitive to the position of the Fermi level. We determine numerically the parameters entering our generic model for the Bernevig-Hughes-Zhang Hamiltonian of a HgTe/CdTe quantum well in the presence of Rashba spin-orbit coupling.

    Item Type: Article
    Journal or Publication Title: Physical Review Letters
    Additional Information: © 2012 American Physical Society
    Subjects: Q Science > QC Physics
    Departments:
    ID Code: 58502
    Deposited By: ep_importer_pure
    Deposited On: 18 Sep 2012 16:03
    Refereed?: Yes
    Published?: Published
    Last Modified: 23 Jul 2014 15:06
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/58502

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