Abstract
We study the thermodynamical properties of the periodic Anderson model (PAM), within the X-boson approach. The exhaustion problem is studied and we calculate the entropy and the specific heat for the heavy fermion Kondo regime (HF-K) of the PAM. We compute numerically the evolution of the Kondo lattice T KL and the Fermi liquid T * temperatures as function of the conduction electron occupation number n c . The results obtained are consistent with others reported in the literature for the Kondo lattice.
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