Spectral-weight function of the ionic Hubbard model
| dc.creator | Refolio, M. C. | |
| dc.creator | Sancho, J. M. Lopez | |
| dc.creator | Rubio, J. | |
| dc.date | 2002-10-21 | |
| dc.date.accessioned | 2026-07-07T02:47:51Z | |
| dc.date.available | 2026-07-07T02:47:51Z | |
| dc.description | The one-electron spectral-weight function of the half-filled ionic Hubbard model is calculated by means of Quantum Monte Carlo. A metallic regimen occurs between two values of the coupling constant (Hubbard U) U1 < U2 . The system is a band insulator below U1, and an increasingly antiferromagnetic (AF) insulator above U2 evolving into a Mott insulator as U tends to infinity . The intermediate regimen which is both AF and dimerized, is caused by a two-peak structure at k = 0,5 pi (the Fermi surface). As U increases both peaks approach each other, overlap, and separate again, the system becoming metallic in the overlap region. | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0210462 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0210462 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/20169 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Spectral-weight function of the ionic Hubbard model | |
| dc.type | text |