Mesoscopic fluctuations of conductance of a helical edge contaminated by magnetic impurities.

@article{Cheianov2013MesoscopicFO,
  title={Mesoscopic fluctuations of conductance of a helical edge contaminated by magnetic impurities.},
  author={Vadim V. Cheianov and Leonid I. Glazman},
  journal={Physical review letters},
  year={2013},
  volume={110 20},
  pages={
          206803
        }
}
Elastic backscattering of electrons moving along the helical edge is prohibited by time-reversal symmetry. We demonstrate, however, that an ensemble of magnetic impurities may cause time-reversal symmetry-preserving quasielastic backscattering, resulting in interference effects in the conductance. The characteristic energy transferred in a backscattering event is suppressed due to the Ruderman-Kittel-Kasuya-Yosida interaction of localized spins (the suppression is exponential in the total… 
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