INTERACTION EFFECTS ON AC CONDUCTIVITY IN DISORDERED METALLIC THIN FILMS

Abstract

The interaction theory has been generalized to the case of anisotropic disordered electron systems. The interaction correction to ac conductivity in a disordered metallic thin film has been calculated in the weakly localized regime. The result turns out that the frequency dependence of this correction changes from three-dimensional (3D) to two-dimensional (2D) behavior with decreasing the film thickness d, and the dimensional crossover occurs at [Formula: see text], with Dz, and Ω being the perpendicular diffusion constant and the applied frequency, respectively.