Reference : Inelastic Electron Backscattering in a Generic Helical Edge Channel
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Inelastic Electron Backscattering in a Generic Helical Edge Channel
Schmidt, Thomas mailto [Yale University > Department of Physics]
Rachel, Stephan [> >]
von Oppen, Felix [> >]
Glazman, Leonid I. [> >]
Phys. Rev. Lett.
American Physical Society
[en] 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, $ G T^4$. In addition, $ 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.

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