Specific Heat of the Periodic Anderson Model: From Weak to Strong Coupling

Details Specific Heat of the Periodic Anderson Model: From Weak to Strong Coupling Specific Heat of the Periodic Anderson Model: From Weak to Strong Coupling

2001-09-20

arxiv.org/abs/cond-mat/0109362v1

Phys. Rev. B 64, 113104 (2001)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages

Scientific paper

10.1103/PhysRevB.64.113104

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 non-symmetric case is discussed.

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