Publicação
Superconductivity in the SU(N) Anderson lattice at U = infinity
| Resumo: | We present a mean-field study of superconductivity in a generalized N-channel cubic Anderson lattice at U=infinity taking into account the effect of a nearest-neighbor attraction J. The condition U=infinity; is implemented within the slave-boson formalism considering the slave bosons to be condensed. We consider the f-level occupancy ranging from the mixed valence regime to the Kondo limit and study the dependence of the critical temperature on the various model parameters for each of three possible Cooper pairing symmetries (extended s-, d-, and p-wave pairing) and find interesting crossovers. It is found that the d- and p-wave order parameters have, in general, very similar critical temperatures. The extended s-wave pairing seems to be relatively more stable for electronic densities per channel close to one and for large values of the superconducting interaction J. |
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| Autores principais: | Araújo, Miguel |
| Outros Autores: | Peres, Nuno; Sacramento, Pedro; Vieira, Vítor |
| Assunto: | supercondutividade rede de Anderson |
| Ano: | 2020 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso restrito |
| Instituição associada: | Universidade de Évora |
| Idioma: | inglês |
| Origem: | Repositório Científico da Universidade de Évora |
| Resumo: | We present a mean-field study of superconductivity in a generalized N-channel cubic Anderson lattice at U=infinity taking into account the effect of a nearest-neighbor attraction J. The condition U=infinity; is implemented within the slave-boson formalism considering the slave bosons to be condensed. We consider the f-level occupancy ranging from the mixed valence regime to the Kondo limit and study the dependence of the critical temperature on the various model parameters for each of three possible Cooper pairing symmetries (extended s-, d-, and p-wave pairing) and find interesting crossovers. It is found that the d- and p-wave order parameters have, in general, very similar critical temperatures. The extended s-wave pairing seems to be relatively more stable for electronic densities per channel close to one and for large values of the superconducting interaction J. |
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