Orbital order in degenerate Hubbard models: A variational study

J. Bünemann, K. Jávorne-Radnóczi, P. Fazekas, F. Gebhard

Research output: Contribution to journalArticle

4 Citations (Scopus)


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.

Original languageEnglish
Article number326217
JournalJournal of Physics Condensed Matter
Issue number32
Publication statusPublished - Aug 15 2007

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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