Temperature dependence of the superconducting order parameter in the FLEX-approximation for the Hubbard model

1997 ◽  
Vol 101 (7) ◽  
pp. 487-492 ◽  
Author(s):  
T. Dahm
Keyword(s):  
Hubbard Model ◽  
Temperature Dependence ◽  
Order Parameter ◽  
Superconducting Order Parameter

ROLE OF HYBRIDIZATION IN THE SUPERCONDUCTING PROPERTIES OF AN EXTENDED d–p HUBBARD MODEL

2004 ◽  
Vol 18 (02) ◽  
pp. 241-252 ◽  
Author(s):  
E. J. CALEGARI ◽  
S. G. MAGALHÃES ◽  
A. A. GOMES
Keyword(s):  
Hubbard Model ◽  
Order Parameter ◽  
Superconducting Order Parameter ◽  
Superconducting Properties

In this work the variational Roth's approach previously developed by the present authors to describe cuprate systems is extended to include the superconducting properties. We extend the Beenen and Edwards approach by including the d–p hybridization. The role of the d–p hybridization in modifying the values of superconducting order parameter is then studied in terms of the adopted values of the parameters defining the Hamiltonian of the system.

THERMOELECTRIC EFFECTS IN Bi–Pb–Sr–Ca–Cu–O SUPERCONDUCTOR

1993 ◽  
Vol 07 (20) ◽  
pp. 1331-1334
Author(s):  
S. M. M. R. NAQVI ◽  
S. DABIR ◽  
H. RIZVI ◽  
SHABIH FATIMA ◽  
S. MOHSIN RAZA
Keyword(s):  
Electrical Resistivity ◽  
Transition Temperature ◽  
Temperature Dependence ◽  
Thermoelectric Power ◽  
Order Parameter ◽  
Superconducting Order Parameter ◽  
Thermoelectric Effects

We have prepared the bulk samples of 2223 Bi–Pb–Sr–Ca–Cu–O superconductor with a T c of 106 K. Temperature dependence of electrical resistivity and thermoelectric power (TEP) measurements were performed on the samples. The behaviour of thermoelectric power near and above the transition temperature can be described on the basis of thermodynamic fluctuations of superconducting order parameter.

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