Spin and valley Hall effects induced by asymmetric interparticle scattering

Abstract

The physics of spin currents has always attracted the attention of Professor Rashba who made seminal contributions to the field. Here, the authors develop the theory of the spin and valley Hall effects in systems of interacting fermions and bosons. In high-mobility two-dimensional semiconductors, the interparticle scattering dominates over the impurity and phonon scattering and controls the transport effects. The authors demonstrate theoretically that the collisions between the quasiparticles give rise to the spin and valley Hall currents via the skew-scattering effect. They also calculate the efficiency of such a process.