Key points are not available for this paper at this time.
There is a correction to the energy band gap obtained from the eigenvalues of the exact one-electron density-functional equation due to the discontinuity in the exchange-correlation potential in an insulator. This correction is expressed in terms of the electron self-energy. If the local-density approximation is used for the exchange-correlation potential, then an additional correction to the gap is needed. Both terms are evaluated for a two-plane-wave model with exchange only. Empirical evidence is also given for the discontinuity.
Sham et al. (Sun,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: