Abstract
The dynamical susceptibility due to local spin fluctuations in transition metals has been calculated in RPA, employing a generalized Wolff model with different Coulomb interactions at host and impurity sites, modified hopping from or into the impurity sites, and including potential scattering. The electrical and thermal resistivities and the diffusion part of the thermopower have been calculated, assuming well-localized spin fluctuations. The results for resistivity and thermopower turn out to be surprisingly similar to those obtained for Kondo systems. In particular, a giant peak in the thermopower is found which is of the same magnitude and of similar shape in both systems. The deviations from the Wiedmann-Franz law are also strongly temperature dependent, with a maximum of about 16% near the spin fluctuation temperature.
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