publication . Article . Preprint . 2004

Dyson orbitals, quasi-particle effects and Compton scattering

B. Barbiellini; A. Bansil;
Open Access
  • Published: 08 May 2004 Journal: Journal of Physics and Chemistry of Solids, volume 65, pages 2,031-2,034 (issn: 0022-3697, Copyright policy)
  • Publisher: Elsevier BV
Abstract
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.
Subjects
free text keywords: Condensed Matter - Materials Science, Condensed Matter - Strongly Correlated Electrons, Atomic orbital, Ground state, Particle model, Compton scattering, Impulse (physics), Quasiparticle, Quantum mechanics, Physics, Kohn–Sham equations, Particle system
Related Organizations
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