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Title: Specific heat of the periodic Anderson model: From weak to strong coupling
Authors: Peres, Nuno
Sacramento, Pedro
Araújo, Miguel
Keywords: rede de Anderson
Issue Date: 15-Sep-2001
Publisher: Physical Review B
Citation: Physical Review B 64, 113104 (2001)
Abstract: We study the temperature dependence of the specific heat in the periodic Anderson model as function of the on-site Coulomb interaction, hybridization, and position of the f electrons energy level. At strong coupling (U = infinity) we use slave bosons, whereas at weak coupling we use a simple Hartree-Fock decomposition. We find that both in the strong and weak coupling limits the specific heat of the system presents a multiple peak structure in a mean field treatment. We believe these features to be related to band-shape effects. The temperature evolution of the low-temperature peak position on the model parameters for the non-half-filled nonsymmetric case is discussed.
Type: article
Appears in Collections:FIS - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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