Anomalous temperature dependence of the order parameter of a superconductor with weakly correlated impurities
I. A. Fomin
P.L. Kapitza Institute for Physical Problems, 119334 Moscow, Russia
Moscow Institute of Physics and Technology, Dolgoprudny, Moscow region
Abstract
It is shown that weak correlations between
pair-breaking
impurities in superconductors
influence the temperature dependence of
the order parameter within the Ginzburg and Landau region if
correlation radius of impurities R is greater than the coherence
length of the superconductor ξ0.
Dependence of a square of the
average order parameter on a temperature difference Tc-T
changes its slope in a region
. Influence of correlations of
impurities on other thermodynamic properties of superconductors
is discussed.