Ferromagnetism in a Realistic Two-Band Model: A Slave-Boson Study
| dc.creator | Fresard, Raymond | |
| dc.creator | Lamboley, Mathieu | |
| dc.date | 2001-09-28 | |
| dc.date.accessioned | 2026-07-07T02:42:52Z | |
| dc.date.available | 2026-07-07T02:42:52Z | |
| dc.description | Using a slave boson representation of multi-band Hubbard models, we investigate a two-band model relevant to layered perovskites in the vicinity of half-filling. Beside the strong influence of the Hund's rule coupling, we obtain that the phase diagram separates into two regions: a weak to moderate coupling region where the effective mass is weakly renormalized, and a strong coupling regime where it is strongly renormalized. The transition between these two regimes is very sharp. It takes place in a (vanishingly) small domain. A ferromagnetic instability in only found in the strongly correlated regime, and is triggered by the Hund's rule coupling. The results are compared to La-doped layered ruthenates. | |
| dc.description | 15 pages, 9 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0109543 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0109543 | |
| dc.identifier | J. Low Temp. Phys. 126, 1091 (2002) | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/18316 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Ferromagnetism in a Realistic Two-Band Model: A Slave-Boson Study | |
| dc.type | text |