Dynamical mean field theory of an effective three-band model for Na$_x$CoO$_2$
| dc.creator | Bourgeois, A. | |
| dc.creator | Aligia, A. A. | |
| dc.creator | Rozenberg, M. J | |
| dc.date | 2009-01-13 | |
| dc.date.accessioned | 2026-07-07T12:40:51Z | |
| dc.date.available | 2026-07-07T12:40:51Z | |
| dc.description | We derive an effective Hamiltonian for highly correlated $t_{2g}$ states centered at the Co sites of Na$_x$CoO$_2$. The essential ingredients of the model are an O mediated hopping, a trigonal crystal-field splitting, and on-site effective interactions derived from the exact solution of a multi-orbital model in a CoO$_6$ cluster, with parameters determined previously. The effective model is solved by dynamical mean-field theory (DMFT). We obtain a Fermi surface (FS) and electronic dispersion that agrees well with angle-resolved photoemission spectra (ARPES). Our results also elucidate the origin of the "sinking-pockets" in different doping regimes. | |
| dc.identifier | https://arxiv.org/abs/0901.1834 | |
| dc.identifier | http://arxiv.org/abs/0901.1834 | |
| dc.identifier | Phys. Rev. Lett. 102, 066402 (2009) | |
| dc.identifier | doi:10.1103/PhysRevLett.102.066402 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/219573 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Dynamical mean field theory of an effective three-band model for Na$_x$CoO$_2$ | |
| dc.type | text |