A theory for electronic transport in heavy fermion systems has been developed and applied to the calculation of the temperature dependence of the resistivity and of the thermoelectric power. The dynamical mean-field theory has been used for the periodic Anderson model (PAM) together with the numerical renor-malization group (NRG) as the impurity solver. To investigate also the influence of impurities and disorder, the method has been combined with the coherent potential approximation (CPA) for disordered systems. Considering two distinct local environments of a binary alloy with arbitrary concentration, two types of disorder have been investigated: on the f-sites and on the ligand sites. The temperature and concentration dependence of the thermoelectric power is calculated. The characteristic concentration dependence as well as the order of magnitude of the thermopower are reproduced for metallic heavy-fermion systems and for Kondo insulators. In particular, sign changes of the Seebeck coefficient as function of temperature and concentration are observed.
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Grenzebach, C., Anders, F.B., Czycholl, G. (2009). Theory of Electronic Transport and Thermoelectricity in Ordered and Disordered Heavy Fermion Systems. In: Zlatić, V., Hewson, A.C. (eds) Properties and Applications of Thermoelectric Materials. NATO Science for Peace and Security Series B: Physics and Biophysics. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-2892-1_10
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