Van Hove singularity and superconductivity in a disordered Hubbard model
Artykuł w czasopiśmie
| Status: | |
| Autorzy: | Litak Grzegorz |
| Rok wydania: | 2002 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 3 |
| Wolumen/Tom: | 229 |
| Strony: | 1427 - 1449 |
| Impact Factor: | 0,93 |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| We apply the Coherent Potential Approximation (CPA) to a simple extended Hubbard model with a nearest and next nearest neighbour hopping for disordered superconductors with s‐, d‐ and p‐wave pairing. We show how the Van Hove singularities in the electron density of states enhance the transition temperature Tc for exotic superconductors in a clean and weakly disordered system. The Anderson theorem and the pair‐breaking effects in presence of the Van Hove singularity caused by non‐magnetic disorder are also discussed. |
