Effect of pair fluctuations on the electronic properties of the negative Hubbard model
Authors:
- J.J. Rodríguez-Núñez,
- S. Schafroth,
- Roman Micnas,
- T. Schneider,
- H. Beck,
- M.H. Pedersen
Abstract
Based on the fact that high-Tc superconductors exhibit strong fluctuations, we have allowed the presence of pair fluctuations in the framework of the T-matrix formalism using the 2-D negative Hubbard model for temperatures above and below Tc. Our equations are fully self-consistent. For T ≥ Tc the electronic properties change drastically with respect to BCS treatment, namely, there is a pseudogap around the chemical potential in the density of states, and the spectral function, A(k,ω), vs. ω exhibits a double peak structure which is related to the appearance of this pseudogap. For T ≤ Tc, we have generalized the formalism in order to include the order parameter. © 1995 Plenum Publishing Corporation.
- Record ID
- UAM2aa31151249d440d839ad604cbd3acb5
- Author
- Journal series
- Journal of Low Temperature Physics, ISSN 0022-2291
- Issue year
- 1995
- Vol
- 99
- Pages
- 315-317
- ASJC Classification
- ; ;
- DOI
- DOI:10.1007/BF00752300 Opening in a new tab
- Language
- (en) English
- Score (nominal)
- 0
- Score source
- journalList
- Publication indicators
- = 5; = 5; : 1999 = 0.610; : 2006 (2 years) = 0.978 - 2007 (5 years) =0.719
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- Uniform Resource Identifier
- https://researchportal.amu.edu.pl/info/article/UAM2aa31151249d440d839ad604cbd3acb5/
- URN
urn:amu-prod:UAM2aa31151249d440d839ad604cbd3acb5
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.