Non-local effects in the fermion Dynamical mean field framework. Application to the 2D Falicov-Kimball model
| dc.creator | Laad, Mukul S. | |
| dc.creator | Bossche, Mathias van den | |
| dc.date | 1998-02-17 | |
| dc.date | 1999-01-13 | |
| dc.date.accessioned | 2026-07-07T03:09:58Z | |
| dc.date.available | 2026-07-07T03:09:58Z | |
| dc.description | We propose a new, controlled approximation scheme that explicitly includes the effects of non-local correlations on the $D=\infty$ solution. In contrast to usual $D=\infty$, the selfenergy is selfconsistently coupled to two-particle correlation functions. The formalism is general, and is applied to the two-dimensional Falicov-Kimball model. Our approach possesses all the strengths of the large-D solution, and allows one to undertake a systematic study of the effects of inclusion of k-dependent effects on the $D=\infty$ picture. Results for the density of states $ρ(ω)$, and the single particle spectral density for the 2D Falicov-Kimball model always yield positive definite $ρ(ω)$, and the spectral function shows striking new features inaccessible in $D=\infty$. Our results are in good agreement with the exact results known on the 2D Falikov-Kimball model. | |
| dc.description | 4 pages, 3 figures, latex. Submitted Eur. Phys. J. B | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9802176 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9802176 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/28099 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Non-local effects in the fermion Dynamical mean field framework. Application to the 2D Falicov-Kimball model | |
| dc.type | text |