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arXiv · 1710.00384

Helical edge transport in the presence of a magnetic impurity

P. D. Kurilovich·V. D. Kurilovich·I. S. Burmistrov·M. Goldstein
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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 is a non-monotonous function of the voltage with several extrema.

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P. D. Kurilovich, V. D. Kurilovich, I. S. Burmistrov, M. Goldstein. 2017-10-01. Helical edge transport in the presence of a magnetic impurity. https://doi.org/10.1134/s0021364017210020

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