Abstract
The dynamics of the reaction, in particular, the screening reaction, of the electron gas to the formation of a single-particle electronic excitation, electron or hole, in different spectroscopies gives rise not only to a reduction of spectral weight of the main quasiparticle peak but also to the generation of satellite structures to fulfill the sum rule for the spectral function. The formation of satellite structures is mainly illustrated in terms of intrinsic losses and the sudden limit. The generation of multiple-plasmon losses is discussed in detail. The relation to the GW approximation is described within the Blomberg-Bergersen-Kus method. Its validity is demonstrated in the limit of dispersionless fermions. As examples core-hole and valence-band photoemission spectroscopies are described and discussed in the light of available experiments.
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Bechstedt, F. (2015). Satellites. In: Many-Body Approach to Electronic Excitations. Springer Series in Solid-State Sciences, vol 181. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-44593-8_17
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DOI: https://doi.org/10.1007/978-3-662-44593-8_17
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