Generation of Spin Currents and Spin Densities in Systems with Reduced Symmetry
Generation of Spin Currents and Spin Densities in Systems with Reduced Symmetry
We show that the spin-current response of a semiconductor crystal to an external electric field is considerably more complex than previously assumed. While in systems of high symmetry only the spin-Hall components are allowed, in systems of lower symmetry other non-spin-Hall components may be present. We argue that, when spin-orbit …