Ab InitioCalculation of Excitonic Effects in the Optical Spectra of Semiconductors
- 18 May 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 80 (20), 4510-4513
- https://doi.org/10.1103/physrevlett.80.4510
Abstract
An ab initio approach to the calculation of excitonic effects in the optical absorption spectra of semiconductors and insulators is formulated. It starts from a quasiparticle band structure calculation and is based on the relevant Bethe-Salpeter equation. An application to bulk silicon shows a substantial improvement with respect to previous calculations in the description of the experimental spectrum, for both peak positions and line shape.Keywords
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