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Density-functional approximation for the correlation energy of the inhomogeneous electron gas

Perdew, John P.·1986·Physical Review B

Abstract

Langreth and Mehl (LM) and co-workers have developed a useful spin-density functional for the correlation energy of an electronic system. Here the LM functional is improved in two ways: (1) The natural separation between exchange and correlation is made, so that the density-gradient expansion of each is recovered in the slowly varying limit. (2) Uniform-gas and inhomogeneity effects beyond the randomphase approximation are built in. Numerical results for atoms, positive ions, and surfaces are close to the exact correlation energies, with major improvements over the original LM approximation for the ions and surfaces.

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Research works printed but not linked: 32

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Cited by

Metadata

Authors
Perdew, J. P.
Venue
Physical Review B
Published
1986-06-15
Volume
33
Issue
12
Pages
8822-8824
ISSN
0163-1829 (ISSN-L)
OpenAlex
W2030687437
Cited by
18,777
References
2
FWCI
8.67
Type
journal article
Language
en
Open access
closed

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