Self-consistent electronic response and collective excitations of a multiwire superlattice of finite barrier height

Abstract

Dielectric response and plasma excitations of a multiwire superlattice consisting of quantum wires (along z axis) periodically repeated in both the x and y directions are investigated. The quantum wells are considered to be separated by barriers of finite height, with consequent tunneling through the potential barriers which we treat employing tight-binding-type envelope wave functions. The intraminiband electron density-density correlation function is derived, and its normal modes (plasmons) are examined for various potential barrier heights.