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Exact exchange Kohn-Sham formalism applied to semiconductors

Städele, M., Moukara, M., Majewski, J. A., Vogl, P., Görling, A.·1999·Physical Review B

Abstract

We present a Kohn-Sham method that allows one to treat exchange interactions exactly within density-functional theory. The method is used to calculate lattice constants, cohesive energies, Kohn-Sham eigenvalues, dielectric functions, and effective masses of various zinc-blende semiconductors (Si, Ge, C, SiC, GaAs, AlAs, GaN, and AlN). The results are compared with values obtained within the local-density approximation, generalized gradient approximations, the Krieger-Li-Iafrate approximation for the Kohn-Sham exchange potential, and the Hartree-Fock method. We find that the exact exchange formalism, augmented by local density or generalized gradient correlations, yields both structural and optical properties in excellent agreement with experiment. Exact exchange-only calculations are found to lead to densities and energies that are close to Hartree-Fock values but to eigenvalue gaps that agree with experiment within 0.2 eV. The generalized gradient approximations for exchange yield energies that are much improved compared to local-density values. The exact exchange contribution to the discontinuity of the exchange-correlation potential is computed and discussed in the context of the band-gap problem.

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Metadata

Authors
Städele, M., Moukara, M., Majewski, J. A., Vogl, P., & Görling, A.
Venue
Physical Review B
Published
1999-04-15
Volume
59
Issue
15
Pages
10031-10043
ISSN
  • 0163-1829 (ISSN-L)
  • 1095-3795
OpenAlex
W2043170787
Cited by
381
References
54
FWCI
9.88
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Exact exchange Kohn-Sham formalism applied to semiconductors. https://app.cochat.ai/papers/10.1103/physrevb.59.10031
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Städele, M., Moukara, M., Majewski, J. A., Vogl, P., & Görling, A. (1999). Exact exchange Kohn-Sham formalism applied to semiconductors. Physical Review B. https://doi.org/10.1103/physrevb.59.10031

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