MODEL FOR INVERSE DIELECTRIC MATRICES OF SEMICONDUCTORS

Authors
BECHSTEDT F FIEDLER M KRESS C DELSOLE R
Citation
F. Bechstedt et al., MODEL FOR INVERSE DIELECTRIC MATRICES OF SEMICONDUCTORS, Solid state communications, 89(8), 1994, pp. 669-672
Citations number
23
Categorie Soggetti
Physics, Condensed Matter
Journal title
Solid state communications → ACNP
ISSN journal
00381098
Volume
89
Issue
8
Year of publication
1994
Pages
669 - 672
Database
ISI
SICI code
0038-1098(1994)89:8<669:MFIDMO>2.0.ZU;2-T
Abstract
A model for the static inverse dielectric matrix is proposed. For cova lent materials the resulting off-diagonal elements are compared with i nverted RPA dielectric matrices obtained from energy-band calculations . Because of the good agreement the model is used in self-energy calcu lations to obtain quasiparticle energies. It is shown that the local-f ield contributions to the exchange-correlation self-energy are reasona bly described.