A NEW DIAGRAM TECHNIQUE FOR THE ANDERSON MODEL

Authors
MEDVEDEV IG
Citation
Ig. Medvedev, A NEW DIAGRAM TECHNIQUE FOR THE ANDERSON MODEL, Journal of physics. Condensed matter, 9(20), 1997, pp. 4129-4138
Citations number
27
Categorie Soggetti
Physics, Condensed Matter
Journal title
Journal of physics. Condensed matter → ACNP
ISSN journal
09538984
Volume
9
Issue
20
Year of publication
1997
Pages
4129 - 4138
Database
ISI
SICI code
0953-8984(1997)9:20<4129:ANDTFT>2.0.ZU;2-O
Abstract
Using the perturbation expansion in the rebonding interaction near the surface molecule limit, a new diagram technique for the Anderson mode l is proposed. The expression for the self-energy in the second order in the rebonding interaction is obtained. Approximate expressions for the self-energy beyond the second order are suggested. The quasipartic le spectrum for the finite-chain model is calculated and compared with the exact results and others in the literature.