Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2011-08-15
J. Phys.: Condens. Matter 24, 055603 (2012)
Physics
Condensed Matter
Strongly Correlated Electrons
14 pages, 9 figures
Scientific paper
We propose an improved fast multi-orbital impurity solver for the dynamical mean field theory (DMFT) based on equations of motion (EOM) of Green's functions and decoupling scheme. In this scheme the inter-orbital Coulomb interactions are treated fully self-consistently, involving the inter-orbital fluctuations. As an example of the derived multi-orbital impurity solver, the two-orbital Hubbard model is studied for various cases. Comparisons are made between numerical results obtained with our EOM scheme and those obtained with quantum Monte Carlo and numerical renormalization group methods. The comparison substantiates a good agreement, but also reveals a dissimilar behavior in the densities of states (DOS) which is caused by inter-site inter-orbital hopping effects and on-site inter-orbital fluctuation effects, thus corroborating the value of the EOM method for the study of multi-orbital strongly correlated systems.
Feng Qingguo
Oppeneer Peter M.
No associations
LandOfFree
Advanced multi-orbital impurity solver for dynamical mean field theory based on the equation of motion approach 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 Advanced multi-orbital impurity solver for dynamical mean field theory based on the equation of motion approach, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Advanced multi-orbital impurity solver for dynamical mean field theory based on the equation of motion approach will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-301043