Sole, R.D., Reining, L. and Godby, R.W. (1994) The GWΓ approach to electron self-energies in semiconductors and insulators. Physical Review B, 49 (12). pp. 8024-8028. ISSN 1098-0121
Full text not available from this repository.Abstract
The widely used GW approximation for the self-energy operator of a system of interacting electrons may, in principle, be improved using an approximate vertex correction Γ. We estimate Γ using the local-density approximation. We report the results of a comparable series of GW calculations for the band structure of silicon, in which such a vertex correction is (i) excluded entirely, (ii) included only in the screened Coulomb interaction W, and (iii) included in both W and the expression for the self-energy. We also discuss the symmetry properties of the exact vertex correction and how they may be retained in further improvements.
| Item Type: | Article |
|---|---|
| Copyright, Publisher and Additional Information: | © 1994 American Physical Society. |
| Academic Units: | The University of York > Physics (York) |
| Depositing User: | Physics Import |
| Date Deposited: | 25 Sep 2008 10:03 |
| Last Modified: | 25 Sep 2008 10:03 |
| Published Version: | http://link.aps.org/abstract/PRB/v49/p8024 |
| Status: | Published |
| Publisher: | American Physical Society |
| Refereed: | Yes |
| Identification Number: | 10.1103/PhysRevB.49.8024 |
| Related URLs: | |
| URI: | http://eprints.whiterose.ac.uk/id/eprint/3983 |
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