%0 Journal Article
%T Gate controlled spin pumping at a quantum spin Hall edge
%A Awadhesh Narayan
%A Aaron Hurley
%A Stefano Sanvito
%J Physics
%D 2013
%I arXiv
%R 10.1063/1.4824068
%X We propose a four-terminal device designed to manipulate by all electrical means the spin of a magnetic adatom positioned at the edge of a quantum spin Hall insulator. We show that an electrical gate, able to tune the interface resistance between a quantum spin Hall insulator and the source and drain electrodes, can switch the device between two regimes: one where the system exhibits spin pumping and the other where the adatom remains in its ground state. This demonstrates an all-electrical route to control single spins by exploiting helical edge states of topological materials.
%U http://arxiv.org/abs/1311.7329v1