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

Cheianov, Vadim and Glazman, Leonid I. (2013) Mesoscopic fluctuations of conductance of a helical edge contaminated by magnetic impurities. Physical review letters, 110 (20). ISSN 0031-9007

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Abstract

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 number of magnetic impurities). We predict the statistics of conductance fluctuations to differ from those in the conventional case of a one-dimensional system with quenched disorder.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Additional Information:
© 2013 American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
65150
Deposited By:
Deposited On:
11 Jun 2013 08:59
Refereed?:
Yes
Published?:
Published
Last Modified:
12 Jul 2020 04:17