On the Crossover from BCS Superconductivity to Bose Condensation
| dc.creator | Micnas, R. | |
| dc.date | 2002-11-25 | |
| dc.date | 2003-05-29 | |
| dc.date.accessioned | 2026-07-07T02:48:22Z | |
| dc.date.available | 2026-07-07T02:48:22Z | |
| dc.description | We outline a microscopic approach to the superconducting fluctuations and pairing correlations in the attractive Hubbard model above Tc, using the functional integral method. A crossover from BCS superconductivity to Bose condensation of preformed pairs is studied by constructing the appropriate Ginzburg-Landau functionals. The differences between the lattice and the continuum models are discussed. The case of quasi-two-dimensional superconductors as well as the model with non-local pairing interaction are also examined. The effects of gaussian fluctuations of the order parameter are analyzed in the T-matrix approach, the self-consistent Hartree approach and finally within the Ginzburg-Landau theory. Simlarities with a paramagnon theory of itinerant-electron magnetism are pointed out. | |
| dc.description | 23 pages, 2 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0211561 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0211561 | |
| dc.identifier | Acta Physica Polonica A100(s), 177-194 (2001) | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/20375 | |
| dc.subject | Superconductivity | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | On the Crossover from BCS Superconductivity to Bose Condensation | |
| dc.type | text |