ABSTRACT
The subject of the topological protection of surface states against momentum scattering events and strong coupling between electron spin and momentum has attracted considerable attention to possible spintronic applications of topological insulators (TI). External magnetic fields break the time reversal symmetry that turns a topological state on and off [1]. An alternative way to bring TI to a trivial state is magnetic doping [2] that forms a ferromagnetic order on the surface. Developing new ways to electrically control surface states would be a critical step toward the practical exploitation of their topological properties.
