Nonlinear transport in superlattices under quantizing magnetic fields

Abstract

Abstract. The transport in semiconductor superlattices subject to quantizing electric and magnetic fields is studied based on the double-time Green function method. Our rigorous quantummechanical approach, which goes beyond the Kadanoff-Baym ansatz, reveals the hopping nature of the high-field transport in narrow-miniband superlattices. In both, the electric-and magnetic-field dependence of the current, gaps appear.