Semiconductor energy gaps in the average Fock approximation
- 15 July 1994
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 50 (4) , 2227-2231
- https://doi.org/10.1103/physrevb.50.2227
Abstract
We find that Slater’s averaged Fock exchange potential, unlike the local-density approximation or Hartree-Fock approximation, results in Ge and GaAs energy gaps in good agreement with experiment. Its cohesive energies disagree with experiment by amounts that are larger than, and of opposite sign to, those of the local-density approximation.Keywords
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