Charge ordering and magnetism in quarter-filled Hubbard-Holstein model
| dc.creator | Kumar, Sanjeev | |
| dc.creator | Brink, Jeroen van den | |
| dc.date | 2008-05-23 | |
| dc.date.accessioned | 2026-07-07T12:08:29Z | |
| dc.date.available | 2026-07-07T12:08:29Z | |
| dc.description | We study a two-dimensional Hubbard-Holstein model with phonons treated in the adiabatic limit. A Hartree-Fock decomposition is employed for the Hubbard term. A range of electronic densities are discussed with special emphasis on the quarter-filling ($n=0.5$). We argue that the quarter-filled system is relevant for the electronic properties observed at the interface between LaAlO$_3$ and SrTiO$_3$, where half-electron per unit cell is transferred to the TiO$_2$ layer as a consequence of the polar discontinuity at the interface. In addition to presenting the overall phase diagrams, we identify an interesting charge-ordered antiferromagnetic phase for $n=0.5$, which was also reported recently in the ab-initio study of the LaAlO$_3$-SrTiO$_3$ interface. | |
| dc.description | 6 pages, 5 figures | |
| dc.identifier | https://arxiv.org/abs/0805.3635 | |
| dc.identifier | http://arxiv.org/abs/0805.3635 | |
| dc.identifier | Phys. Rev. B 78, 155123 (2008) | |
| dc.identifier | doi:10.1103/PhysRevB.78.155123 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/209334 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Charge ordering and magnetism in quarter-filled Hubbard-Holstein model | |
| dc.type | text |