Mott-Hubbard insulators for systems with orbital degeneracy

Preprint

21 January 1997

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9701151

Abstract

We study how the electron hopping reduces the Mott-Hubbard band gap in the limit of a large Coulomb interaction U and as a function of the orbital degeneracy N. The results support the conclusion that the hopping contribution grows as roughly \sqrt{N}W, where W is the one-particle band width, but in certain models a crossover to a \sim NW behavior is found for a sufficiently large N.

Keywords

ORBITAL DEGENERACY
HUBBARD INSULATORS
ELECTRON HOPPING
HOPPING REDUCES
MOTT HUBBARD
COULOMB

All Related Versions

Version 1, 1997-01-21, ArXiv
Published version: Physical Review B, 56 (3), 1146.

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