Calculation of Local Effective Fields: Optical Spectrum of Diamond
- 14 February 1972
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 28 (7), 446-449
- https://doi.org/10.1103/physrevlett.28.446
Abstract
The random-phase-approximation formalism describing local fields developed by Adler and by Wiser is evaluated for an insulator for the first time. It is shown that umklapp effects decrease the low-frequency electronic dielectric constant, contrary to what is required to reconcile theory with experiment for most semiconductors. A simple prescription for effects of dynamical correlation is shown to improve agreement with experiment for diamond.Keywords
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