Home
| VOLUME 106 (2017) | ISSUE 9 | PAGE 575 |
|---|
|
Helical edge transport in the presence of a magnetic impurity
P. D. Kurilovicha,b,c, V. D. Kurilovicha,b,c, I. S. Burmistrova,c,d,e, M. Goldsteinf
aMoscow Institute of Physics and Technology, 141700 Moscow, Russia bSkolkovo Institute of Science and Technology, 143026 Moscow, Russia cL.D. Landau Institute for Theoretical Physics RAS, 119334 Moscow, Russia dInstitut für Theorie der kondensierten Materie, Karlsruhe Institute of Technology, 76128 Karlsruhe, Germany eInstitut für Nanotechnologie, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany fRaymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv 6997801, Israel
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 non-monotonous dependence on the voltage with several extrema. |