The one-electron Green's function of the half-filled Hubbard model on a triangular lattice
| dc.creator | Refolio, M. C. | |
| dc.creator | Sancho, J. M. Lopez | |
| dc.creator | Rubio, J. | |
| dc.date | 2001-03-22 | |
| dc.date.accessioned | 2026-07-07T02:40:49Z | |
| dc.date.available | 2026-07-07T02:40:49Z | |
| dc.description | The one-electron density of states for the half-filled Hubbard model on a triangular lattice is studied as a function of both temperature and Hubbard U using Quantum Monte Carlo. We find three regimes: (1) a strong-coupling Mott-Hubbard regime, characterized by a gap which persists even at high temperatures; (2) a weak-coupling paramagnetic regime, characterized by the absence of a pseudogap at any finite temperature; and (3) an intermediate-coupling (spiral) spin-density-wave regime, characterized by a pseudogap which appears when U is increased beyond a critical (temperature dependent) value. The behavior of the sqrt(3) times sqrt{3} adlayer structures on fourth-group semiconductor surfaces is briefly commented upon in the light of the above discussion. | |
| dc.description | 10 pages, 8 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0103459 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0103459 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/17513 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Materials Science | |
| dc.title | The one-electron Green's function of the half-filled Hubbard model on a triangular lattice | |
| dc.type | text |