2000•arXiv (Cornell University)Open access

Electronic properties of the degenerate Hubbard Model : A dynamical mean\n field approach

P. Lombardo, G. Albinet

Abstract

We have investigated electronic properties of the degenerate multi-orbital\nHubbard model, in the limit of large spatial dimension. A new local model,\nincluding a doubly degenerate strongly correlated site has been introduced and\nsolved in the framework of the non-crossing approximation (NCA). Mott-Hubbard\ntransitions have been examined in details, including the calculation of Coulomb\nrepulsion critical values and electronic densities of states for any regime of\nparameters.\n

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Key concepts: Degenerate energy levels, Hubbard model, Limit (mathematics), Coulomb, Physics, Mean field theory, Dimension (graph theory), Dynamical mean field theory