Quasiparticle bandstructure calculations for semiconductors treat the exchange-correlation self-energy operator within the GW approximation. In this paper, a detailed study of the energy dependence of the self-energy due to dynamical screening is presented. Spectral functions for near-band-gap excitations in silicon and diamond are calculated and the quasiparticle peak and satellite structures are discussed.
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Bechstedt et al. (1994) studied this question.
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