The temperature dependence of the thermoelectric power (TEP) of Kondo Ce and Yb compounds is theoretically studied by a new approach: for T much greater than T-K, we start from the Coqblin-Schrieffer Hamiltonian including the crystalline field effect and we use a renormalized perturbation expansion with the coupling constants calculated by the "poor man's scaling" method; for T much less than T-K, we use an effective spin-(1)/(2) periodic Anderson model. This treatment can give a negative peak at low temperatures and a positive one at high temperatures, in good agreement with the TEP curves of many Cc compounds. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 10]
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