Thermodynamic, Transport, and Excitation Properties of Ce Impurities in a Model Metal: Kondo Resonance and Universality in the Mixed-Valent Regime

Abstract

A unified view of the mixed-valence system of Ce impurities in a metal results from a comprehensive calculation of its properties. The peak position $T_0$ of the Kondo resonance in the photoemission spectrum sets the scale for the universal functions describing the specific heat, susceptibility, resistivity, thermopower, thermal conductivity, and neutron-scattering function. Deviations from universality arise when $T_0$ becomes comparable to the hybridization width $\Gamma$ or the spin-orbit splitting $\Delta$.