CALCULATION OF TRANSPORT-PROPERTIES OF THE ANDERSON LATTICE

A new scheme of self-consistent integral equations for the Anderson lattice model is set up and exploited for a calculation of the density of states and of transport coefficients like resistivity and thermoelectric power. It generalizes the noncrossing approximation (NCA) for the single-impurity model by incorporating lattice effects in a local approximation, valid for large spatial dimensions, and concentrates on the simplest contribution for the self-energy correction due to the lattice. A formation of a hybridization gap at the Fermi level is seen as well as a tendency to fulfill Luttinger's theorem. A pronounced maximum of the resistivity and a sign-change of the thermoelectric power are obtained.