Dyson orbitals, quasi-particle effects and Compton scattering

Title:
Dyson orbitals, quasi-particle effects and Compton scattering
Creator:
Barbiellini, B. (Author)
Bansil, A. (Author)
Language:
English
Publisher:
January 01, 2004
Type of resource:
Text
Genre:
Articles
Format:
electronic
Digital origin:
born digital
Abstract/Description:
Dyson orbitals play an important role in understanding quasi-particle effects in the correlated ground state of a many-particle system and are relevant for describing the Compton scattering cross section beyond the frameworks of the impulse approximation (IA) and the independent particle model (IPM). Here we discuss corrections to the Kohn-Sham energies due to quasi-particle effects in terms of Dyson orbitals and obtain a relatively simple local form of the exchange-correlation energy. Illustrative examples are presented to show the usefulness of our scheme.
Comments:
Originally posted at http://arxiv.org/abs/cond-mat/0405167v1. Preprint of an article published in Journal of Physics and Chemistry of Solids, v.65 no.12, 2004.
Subjects and keywords:
Condensed matter
Materials science
Quasiparticles (Physics)
Dyson orbitals
Compton scattering
Kohn-Sham
Physics

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