Abstract
The calculation of molecular bond energies is a sensitive test of exchange-correlation approximations in density functional theory. The well known local density approximation (LDA) gives excellent bond lengths and vibrational frequencies, but seriously overestimates dissociation energies. Therefore, we have investigated the effect on bond energies of nonlocal corrections to the LDA exchange-correlation functional. We consider the nonlocal correction term of Langreth and Mehl, and also a new semiempirical exchange energy correction. Significant improvements over the LDA dissociation energies are obtained in calculations on first-, second-, and third-row homonuclear diatomic systems.
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Dates
Type | When |
---|---|
Created | 23 years ago (July 26, 2002, 9 a.m.) |
Deposited | 1 year, 6 months ago (Feb. 9, 2024, 11:29 p.m.) |
Indexed | 3 weeks ago (July 30, 2025, 11:25 a.m.) |
Issued | 39 years, 4 months ago (April 15, 1986) |
Published | 39 years, 4 months ago (April 15, 1986) |
Published Print | 39 years, 4 months ago (April 15, 1986) |
@article{Becke_1986, title={Density functional calculations of molecular bond energies}, volume={84}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.450025}, DOI={10.1063/1.450025}, number={8}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Becke, A. D.}, year={1986}, month=apr, pages={4524–4529} }