Dyson orbitals, quasi-particle effects and Compton scattering

被引：15

作者：

Barbiellini, B ^{[1
]}

Bansil, A ^{[1
]}

机构：

[1] Northeastern Univ, Dept Phys, Boston, MA 02115 USA

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2004年 / 65卷 / 12期

关键词：

D O I：

10.1016/j.jpcs.2004.08.016

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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. (C) 2004 Elsevier Ltd. All rights reserved.

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页码：2031 / 2034

页数：4

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