Effects of Intra-Site Vibrations on the Electrical Conductivity in a Disordered Hubbard Chain

Abstract

Electrical conductivity is calculated in the Hubbard model for a disordered chain. The intra-site Coulomb repulsion is assumed to be sufficiently strong, and the electron-transfer term is treated as a perturbation. The interaction between electrons and intra-site vibrations is taken into account by two types of coupling terms. The effects of this interaction on the conductivity are discussed.