2000 character limit reached
Helical edge transport in the presence of a magnetic impurity (1710.00384v2)
Published 1 Oct 2017 in cond-mat.mes-hall
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.