Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1998-02-17
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 3 figures, latex. Submitted Eur. Phys. J. B
Scientific paper
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 $\rho(\omega)$, and the single particle spectral density for the 2D Falicov-Kimball model always yield positive definite $\rho(\omega)$, 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.
den Bossche Mathias van
Laad Mukul S.
No associations
LandOfFree
Non-local effects in the fermion Dynamical mean field framework. Application to the 2D Falicov-Kimball model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Non-local effects in the fermion Dynamical mean field framework. Application to the 2D Falicov-Kimball model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-local effects in the fermion Dynamical mean field framework. Application to the 2D Falicov-Kimball model will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-602827