Helical edge transport in the presence of a magnetic impurity

P. D. Kurilovich, V. D. Kurilovich, I. S. Burmistrov, M. Goldstein

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)593-599
Number of pages7
JournalJETP Letters
Issue number9
StatePublished - 1 Nov 2017


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