Self-consistent treatment of crystal-electric-field-levels in the Anderson lattice

Abstract We consider an Anderson lattice model with a spin 1 2 degenerated conduction electron band and localized ionic CEF-levels, classified according to the irreducible representation of the point group of the lattice. We present the self-consistency equations for local approximations (“d → ∞” approximation) for the periodic Anderson model. It leads to a matrix formulation of the effective local density of states and the lattice f-Green's function. We derive the quasi-particle life-time which enters the Boltzmann transport equations. The impact of a k-dependent hybridization is discussed. We prove that vertex corrections will vanish, as long as all states of an irreducible representation couple to the conduction electron band with a hybridization matrix element of the same parity.