Electron Correlations in Narrow Energy Bands. V. A Perturbation Expansion About the Atomic Limit

Electron Correlations in Narrow Energy Bands. V. A Perturbation Expansion About the Atomic Limit

A perturbation expansion about the atomic limit in powers of the interaction between atoms is developed and a graphical analysis of the terms of the series is described. The manner in which the series degenerates in the band theory limit is discussed and a rule for generating approximations valid in...

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Veröffentlicht in:Proceedings of the Royal Society of London. Series A, Mathematical and physical sciences Mathematical and physical sciences, 1967-01, Vol.296 (1444), p.82-99
1. Verfasser: Hubbard, J.
Format: Artikel
Sprache:eng
Schlagworte:
Atomic interactions
Atoms
Electrons
Energy bands
Greens function
Line graphs
Perturbation theory
Product labeling
Self consistent fields
Vertices
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Beschreibung
Zusammenfassung:A perturbation expansion about the atomic limit in powers of the interaction between atoms is developed and a graphical analysis of the terms of the series is described. The manner in which the series degenerates in the band theory limit is discussed and a rule for generating approximations valid in both the atomic and band theory limits is given and applied to discuss the electron propagator.
ISSN:1364-5021
0080-4630
1471-2946
2053-9169
DOI:10.1098/rspa.1967.0007