ISSN:
1573-7357
Keywords:
74.20Mn
;
74.25.−q
;
74.72.−h
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00752300
Permalink