Specific heat of the periodic Anderson model: From weak to strong coupling
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...
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| Outros Autores: | , |
| Formato: | article |
| Idioma: | eng |
| Publicado em: |
2020
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| Assuntos: | |
| Texto completo: | http://hdl.handle.net/10174/26383 |
| País: | Portugal |
| Oai: | oai:dspace.uevora.pt:10174/26383 |
| Resumo: | 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. |
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