| Автор | J. V. Alvarez |
| Автор | J. González |
| Дата выпуска | 1998-12-01 |
| dc.description | We apply a Wilsonian renormalization group approach to the continuum limit of the attractive t − t′ Hubbard model, taken when the Fermi level is at the Van Hove singularity of the density of states. We determine the leading instabilities by computing the different response functions up to t′ = 0.5 t. The phase diagram shows a large boundary between superconducting and charge-density-wave phases, that merge in a triple point with a phase separation instability. The latter is realized down to very low coupling constant, as the Fermi sea degenerates towards a pair of straight lines near t′ = 0.5 t. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Копирайт | 1998 EDP Sciences |
| Название | Weak-coupling phases of the attractive t − t′ Hubbard model at the Van Hove filling |
| Тип | lett |
| DOI | 10.1209/epl/i1998-00520-y |
| Electronic ISSN | 1286-4854 |
| Print ISSN | 0295-5075 |
| Журнал | EPL (Europhysics Letters) |
| Том | 44 |
| Первая страница | 641 |
| Последняя страница | 647 |
| Выпуск | 5 |
