Radiation damage effects in Nd2−xCexCuO4−y thin films

Destruction of superconductivity inNd2−xCexCuO

“…Preliminary studies on NCCO suggested that its dependence of T c on damage is similar to that of Y-Ba-Cu-O and other hole-doped cuprates. 7,8 Here we present data on a set of films that exhibit a continuous destruction of superconducting behavior with increasing ion damage. A small amount of ion-induced disorder raises the residual resistivity and decreases the T c .…”

Critical temperature of an anisotropic superconductor containing both nonmagnetic and magnetic impurities

“…Numerous experimental studies give evidence for T c degradation by impurity doping [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48] or radiation damage [49][50][51][52][53][54][55][56][57][58] of HTSCs, the two effects being remarkably analogous if the dependence of T c on the in-plane residual resistivity ρ 0 is considered [59]. Impurity-induced scattering of charge carriers in doped HTSCs and their scattering by displaced host atoms in irradiated HTSCs are believed to be the main reasons for the suppression of superconductivity and the increase in ρ 0 [35,36,44,45,51,52,54,55].…”

“…On the other hand, theoretical considerations of impurity scattering in anisotropic superconductors are commonly restricted to nonmagnetic scatterers only [20,21,[23][24][25][27][28][29][30][31][32]60,62,64]. Such a status of the theory of impure superconductors results in situations when the experiments on the T c reduction by impurities or radiation-induced defects in HTSCs are compared with either the Abrikosov-Gor'kov formula for T c of isotropic s-wave superconductor containing magnetic impurities [38,47,51,70] or the formula for T c of anisotropic superconductor but containing nonmagnetic impurities only [41,51,[53][54][55]. In the latter case an a priori suggestion is often made about pure d-wave symmetry of ∆(p) [50,56,58].…”