Helical edge transport in the presence of a magnetic impurity
Abstract
We consider the effects of electron scattering off a quantum magnetic impurity on the current-voltage characteristics of the helical edge of a two-dimensional topological insulator. We compute the backscattering contribution to the current along the edge for a general form of the exchange interaction matrix and arbitrary value of the magnetic impurity spin. We find that the differential conductance may exhibit a nonmonotonic dependence on the voltage with several extrema.
- Publication:
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Soviet Journal of Experimental and Theoretical Physics Letters
- Pub Date:
- November 2017
- DOI:
- 10.1134/S0021364017210020
- arXiv:
- arXiv:1710.00384
- Bibcode:
- 2017JETPL.106..593K
- Keywords:
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- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- 7 pages, 1 figure, to appear in JETP Letters