A model of the spin-dependent skew scattering in semiconductors

Abstract

The control of the spin Hall Effect with the polarization degree is an emerging strategy for including new functionality in spintronic devices. The dependence of spin hall conductance on spin polarization is reported. It is shown that skew scattering term depends on electrons temperature and spin polarization. We use the spherical harmonics method to calculate the dependence of the spin Hall angle on energy shift in the spin-polarized paramagnetic semiconductor. Transport coefficients obtained from the density matrix kinetic equation and spherical harmonics expansion. The skew scattering coefficient is computed numerically. It is shown that spin Hall coefficients nonlinearly depend on the degree of spin polarization. The results indicate that the spin Hall angle can nonlinearly depend on the spin polarization of the electron gas. This feature opens new way to control spin transport in paramagnetic materials like semiconductors or heavy metals.