Interaction correction to ac conductivity in the disordered tunneling superlattice

The interaction theory has been generalized to the case of anisotropic disordered electron systems. The interaction correction to ac conductivity in a tunneling superlattice has been calculated in the weakly localized regime. The result is that the frequency dependence of this correction changes from three-dimensional (3D) to two-dimensional (2D) behavior with decreasing the interlayer coupling. The dimensional crossover effect has been discussed.