Applications of the Optimized Effective Potential Method of Density Functional Theory to Atomic and Molecular Systems

Details Applications of the Optimized Effective Potential Method of Density Functional Theory to Atomic and Molecular Systems Applications of the Optimized Effective Potential Method of Density Functional Theory to Atomic and Molecular Systems

1996-08-28

arxiv.org/abs/chem-ph/9608005v1

Physics

Chemical Physics

23 pages, LateX, 4 PostScript figures included, to appear in International Journal of Quantum Chemistry

Scientific paper

Using the optimized effective potential method in conjunction with the semi-analytical approximation due to Krieger, Li and Iafrate, we have performed fully self-consistent exact exchange-only density-functional calculations for diatomic molecules with a fully numerical basis-set-free molecular code. The results are very similar to the ones obtained with the Hartree Fock approach. Furthermore we present results for ground states of positive atomic ions including correlation contributions in the approximation of Colle and Salvetti. It is found that the scheme performs significantly better than conventional Kohn-Sham calculations.

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