Exact exchange treatment for molecules in finite-basis-set kohn-sham theory

Stanislav Ivanov, So Hirata, Rodney J. Bartlett

Research output: Contribution to journalArticlepeer-review

Abstract

The exact orbital-dependent exchange (EXX) energy formalism within the linear-combination-of-atomic-orbital Kohn-Sham density functional theory for polyatomic molecules is presented and implemented. The exchange energies and occupied orbital energies obtained from EXX are very close to the corresponding Hartree-Fock (HF) values, whereas the EXX unoccupied orbital energies are significantly lower than the HF values. We demonstrate that the current approximate correlation functionals deteriorate the orbital energies when combined with EXX.

Original languageEnglish (US)
Pages (from-to)5455-5458
Number of pages4
JournalPhysical review letters
Volume83
Issue number26
DOIs
StatePublished - Jan 1 1999
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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