Superconducting critical temperature via a nonperturbative calculation of the vertex function

Authors
Cosenza, F De Cesare, L Girard, MF
Citation
F. Cosenza et al., Superconducting critical temperature via a nonperturbative calculation of the vertex function, PHYS REV B, 59(5), 1999, pp. 3349-3352
Citations number
27
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
59
Issue
5
Year of publication
1999
Pages
3349 - 3352
Database
ISI
SICI code
0163-1829(19990201)59:5<3349:SCTVAN>2.0.ZU;2-Z
Abstract
The basic idea of the gauge technique is used for a nonperturbative study o f the vertex correction effects on the BCS formula for the superconducting critical temperature. Qualitative agreement with recent perturbative predic tions is found, supporting the effectiveness of the approach. Nevertheless, some questions arise about the validity limit of the BCS pairing model whi ch stimulate further deeper investigations. [S0163-1829(99)04402-1].