Electron correlations in narrow energy bands

  title={Electron correlations in narrow energy bands},
  author={J. Hubbard},
  journal={Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences},
  pages={238 - 257}
  • J. Hubbard
  • Published 26 November 1963
  • Physics
  • Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
It is pointed out that one of the main effects of correlation phenomena in d- and f-bands is to give rise to behaviour characteristic of the atomic or Heitler-London model. To investigate this situation a simple, approximate model for the interaction of electrons in narrow energy bands is introduced. The results of applying the Hartree-Fock approximation to this model are examined. Using a Green function technique an approximate solution of the correlation problem for this model is obtained… 

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