Band structure renormalization and weak pseudogap behavior in Na_{0.33}CoO_2: Fluctuation exchange study based on a single band model
| dc.creator | Yao, Zi-Jian | |
| dc.creator | Li, Jian-Xin | |
| dc.creator | Wang, Z. D. | |
| dc.date | 2007-08-19 | |
| dc.date | 2008-03-16 | |
| dc.date.accessioned | 2026-07-07T09:26:42Z | |
| dc.date.available | 2026-07-07T09:26:42Z | |
| dc.description | Based on a single band Hubbard model and the fluctuation exchange approximation, the effective mass and the energy band renormalization in Na$_{0.33}$CoO$_2$ is elaborated. The renormalization is observed to exhibit certain kind of anisotropy, which agrees qualitatively with the angle-resolved photoemission spectroscopy (ARPES) measurements. Moreover, the spectral function and density of states (DOS) in the normal state are calculated, with a weak pseudogap behavior being seen, which is explained as a result of the strong Coulomb correlations. Our results suggest that the large Fermi surface (FS) associated with the $a_{1g}$ band plays likely a central role in the charge dynamics. | |
| dc.description | 5 pages, 5 figures | |
| dc.identifier | https://arxiv.org/abs/0708.2553 | |
| dc.identifier | http://arxiv.org/abs/0708.2553 | |
| dc.identifier | Phys. Rev. B 76, 212506 (2007) | |
| dc.identifier | doi:10.1103/PhysRevB.76.212506 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/156846 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Band structure renormalization and weak pseudogap behavior in Na_{0.33}CoO_2: Fluctuation exchange study based on a single band model | |
| dc.type | text |