Short-wavelength fluctuation regime in paraconductivity of bulk monophase (Bi, Pb)-2223 superconductor system

The Aslamasov-Larkin contribution of the excess-conductivity, calculated within the Lorentz-Doniach model shows that a crossover from 3D to 2D dimensionality is taken place at about 110.41K for our bulk monophase (Bi, Pb)-2223 samples. A bending of the log-log curves from 2D behavior through those of SWF (short wavelength fluctuation) behavior was also observed at a temperature about 135.43K (far from Tan). The theoretical fits are also consistent with the following formula for paraconductivity (06=(e2/16 hs)f(s)) expressed in terms of so called universal function f(s), where s= In(T/Tc). In the Ginzburg-Landau region (s < < 1) we take f(s) =1/e, but in the SWF region (s > > 1) we have f(s)=1/E3.