Local and general aspects of current profiles in quantum magnetotransport

Abstract

We present a formal and numerical analysis of current distribution through two-dimensional electron gas systems threaded by a magnetic field. The nonequilibrium Keldysh formalism is elaborated into a procedure well suited to describe both local features of carrier flow and universal features connected to the spatial chirality produced by strong magnetic fields. The interplay between disorder and chirality is illustrated by numerical simulations of significant models