Orbital order in degenerate Hubbard models : A variational study
Strongly Correlated Electrons
2015-05-13 v2
Abstract
We use the Gutzwiller variational many-body theory to investigate the stability of orbitally ordered states in a two-band Hubbard-model without spin degrees of freedom. Our results differ significantly from earlier Hartree-Fock calculations for this model. The Hartree-Fock phase diagram displays a large variety of orbital orders. In contrast, in the Gutzwiller approach orbital order only appears for densities in a narrow region around half filling.
Keywords
Cite
@article{arxiv.0705.3318,
title = {Orbital order in degenerate Hubbard models : A variational study},
author = {Joerg Buenemann and Katalin Javorne-Radnoczi and Patrik Fazekas and Florian Gebhard},
journal= {arXiv preprint arXiv:0705.3318},
year = {2015}
}