Band Degeneracy and Mott Transition: Dynamical Mean Field Study

Details Band Degeneracy and Mott Transition: Dynamical Mean Field Study Band Degeneracy and Mott Transition: Dynamical Mean Field Study

1996-09-18

arxiv.org/abs/cond-mat/9609176v1

Physics

Condensed Matter

Scientific paper

We investigate the Mott transition in infinite dimensions in the orbitally degenerate Hubbard model. We find that the qualitative features of the Mott transition found in the one band model are also present in the orbitally degenerate case. Surprisingly, the quantitative aspects of the transition around density one are not very sensitive to orbital degeneracy, justifying the quantitative success of the one band model which was previously applied to orbitally degenerate systems. We contrast this with quantities that have a sizeable dependence on the orbital degeneracy and comment on the role of the intraatomic exchange J.

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