Band filling effects on coherence lengths and penetration depth in the two-orbital negative-U Hubbard model of superconductivity
Artykuł w czasopiśmie
| Status: | |
| Autorzy: | Litak Grzegorz, Örd Teet, Rägo Küllike, Vargunin Artjom |
| Rok wydania: | 2012 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Wolumen/Tom: | 483 |
| Strony: | 30 - 33 |
| Impact Factor: | 0,718 |
| Web of Science® Times Cited: | 8 |
| Scopus® Cytowania: | 8 |
| Bazy: | Web of Science | Scopus |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| The two-orbital superconducting state is modeled by on-site intra-orbital negative-U Hubbard correlations together with inter-orbital pair-transfer interactions. The critical temperature is mainly governed by intra-orbital attractive interactions and it can pass through an additional maximum as a function of band filling. For the certain number of electrons the clear interband proximity effect is observable in the superconducting state of the band with a smaller gap. The influence of band fillings and orbital site energies on the temperature dependencies of two-component superconductivity coherence lengths and magnetic field penetration depth is analyzed. The presence of proximity effect is probably reflected in the relative temperature behaviour of characteristic lengths. |
