Anomalous temperature dependence of the order parameter of a superconductor with weakly correlated impurities
Abstract
It is shown that weak correlations between the pair-breaking impurities in superconductors influence a temperature dependence of the order parameter within the Ginzburg and Landau region if the correlation radius of impurities R is greater than the coherence length of the superconductor 0.Dependence of the square of the average order parameter on a temperature difference Tc-T changes its slope in a region 0Tc/(Tc-T) R . Influence of correlations on other thermodynamic properties of superconductors is discussed too.
0