Dynamical correlations in multiorbital Hubbard models: Fluctuation-exchange approximations

Details Dynamical correlations in multiorbital Hubbard models: Fluctuation-exchange approximations Dynamical correlations in multiorbital Hubbard models: Fluctuation-exchange approximations

2003-07-28

arxiv.org/abs/cond-mat/0307682v2

J. Phys.: Condens. Matter 17 (2005) 61-74

Physics

Condensed Matter

Strongly Correlated Electrons

18 pages with 12 PS figures

Scientific paper

10.1088/0953-8984/17/1/007

We study the two band degenerate Hubbard model using the Fluctuation Exchange approximation (FLEX) method and compare the results with Quantum Monte-Carlo calculations. Both the self-consistent and the non-self-consistent versions of the FLEX scheme are investigated. We find that, contrary to the one band case, in the multiband case, good agreement with the Quantum Monte-Carlo results is obtained within the electron-electron T-matrix approximation using the full renormalization of the one-particle propagators. The crossover to strong coupling and the formation of satellites is more clearly visible in the non-self-consistent scheme. Finally we discuss the behavior of the FLEX for higher orbital degeneracy.

Affiliated with

Also associated with

No associations

Rating

Dynamical correlations in multiorbital Hubbard models: Fluctuation-exchange approximations 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 Dynamical correlations in multiorbital Hubbard models: Fluctuation-exchange approximations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamical correlations in multiorbital Hubbard models: Fluctuation-exchange approximations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-107847