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Perturbative expansion for the p-d model around the hopping term

✍ Scribed by Canio Noce; Alfonso Romano; Ferdinando Mancini; Maria Marinaro

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 133 KB
Volume: 194-196
Category: Article
ISSN: 0921-4526
DOI: 10.1016/0921-4526(94)90927-x

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✦ Synopsis

84081 Baronissi (S A), It aly A non-standard perturbative solution of the p-d model around the hopping term, based on a generalised cumulant expansion, is proposed. Starting from the expression of the irreducible single-~ite Green functions, the Dyson equation for the one-particle propagators is obtained. A qualitative comparison with similar perturbative approaches is discussed.

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