Godby, R.W., Schlüter, M. and Sham, L.J. (1987) Trends in self-energy operators and their corresponding exchange-correlation potentials. Physical Review B, 36 (12). pp. 6497-6500. ISSN 1098-0121
Abstract
We examine the trends in the self-energy operators of Si, diamond, GaAs, and AlAs, and in their corresponding exchange-correlation potentials Vxc and their discontinuities Δ. The potentials are calculated from the self-energies, thus avoiding use of a local-density approximation (LDA). In each case about 80% of the LDA band-gap error is also present for the true density-functional theory eigenvalue difference derived from Vxc and so is caused by Δ. The self-energies themselves, calculated in the Hedin-Lundqvist GW approximation, reproduce the experimental quasiparticle energies accurately, and are also shown to be well modeled by a simple functional form in real space.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 1987 American Physical Society. |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Physics Import |
Date Deposited: | 18 Sep 2008 16:05 |
Last Modified: | 18 Sep 2008 16:05 |
Published Version: | http://link.aps.org/abstract/PRB/v36/p6497 |
Status: | Published |
Publisher: | American Physical Society |
Refereed: | Yes |
Identification Number: | 10.1103/PhysRevB.36.6497 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:3964 |