Boltzmann Theory Generalized to Include Band Mixing: A Possible Theory for "Resistivity Saturation" in Metals

Abstract

Disorder such as defects or phonons causes interband scattering and renormalization effects. When these are included in a generalization of Boltzmann transport theory, an interband conduction channel opens up which might account for the "parallel-resistor" effect seen in "saturation" of dc resistance of metals.