Self-consistent Hartree-Fock calculation of exchange effects in a weakly inhomogeneous electron gas

D. J. Wallace Geldart, Mark Rasolt, Carl-Olof Almbladh

Research output: Contribution to journalArticlepeer-review

Abstract

An exact calculation is given for the function Bx(n) which enters the Hohenberg-Kohn-Sham expansion, in powers of ▿n(r), of the echange energy of an inhomogeneous eletron gas. The calculation is made for arbitrary inter-particle interaction. It is shown that the gradient expansion does not exist, in the case of Coulomb interaction, unless correlations are taken into account.
Original languageEnglish
Pages (from-to)243-246
JournalSolid State Communications
Volume16
Issue number2
Publication statusPublished - 1975

Subject classification (UKÄ)

  • Physical Sciences

Keywords

  • many-body theory
  • density functional theory
  • Electron gas

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