SEMICONDUCTOR ENERGY GAPS IN THE AVERAGE FOCK APPROXIMATION

Authors
GU YM BYLANDER DM KLEINMAN L
Citation
Ym. Gu et al., SEMICONDUCTOR ENERGY GAPS IN THE AVERAGE FOCK APPROXIMATION, Physical review. B, Condensed matter, 50(4), 1994, pp. 2227-2231
Citations number
27
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
50
Issue
4
Year of publication
1994
Pages
2227 - 2231
Database
ISI
SICI code
0163-1829(1994)50:4<2227:SEGITA>2.0.ZU;2-3
Abstract
We find that Slater's averaged Fock exchange potential, unlike the loc al-density approximation or Hartree-Fock approximation, results in Ge and GaAs energy gaps in good agreement with experiment. Its cohesive e nergies disagree with experiment by amounts that are larger than, and of opposite sip to, those of the local-density approximation.