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Nonlocal density scheme for electronic-structure calculations

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  • Nonlocal density scheme for electronic-structure calculations
Author
Maurizia Palummo
G Onida
Rodolfo Del Sole
M Corradini
Lucia Reining
Keywords
paper
Abstract

An exchange-correlation energy functional beyond the local-density approximation (LDA), based on the exchange-correlation kernel of the homogeneous electron gas and originally introduced by Kohn and Sham, is considered for electronic-structure calculations of semiconductors and atoms. Calculations are carried out for diamond, silicon, silicon carbide, and gallium arsenide. The lattice constants and gaps show a small improvement with respect to the LDA results. However, the corresponding corrections to the total energy of the isolated atoms are not large enough to yield a substantial improvement for the cohesive energy of solids, which remains hence overestimated as in the LDA. [S0163-1829(99)01940-2].

Year of Publication
1999
Journal
Phys. Rev. B
Volume
60
Number of Pages
11329-11335
Date Published
OCT 15
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