CARRIER-DEPENDENT T-C-SUPPRESSION IN CU-SITE SUBSTITUTED HIGH-T-C CUPRATES

We studied the T-c-suppression by Cu-site substitution in Bi2Sr2Ca1-xY x (Cu(1-z)M(x))(2)O-8+delta (Bi-2212) with M=Fe,Co,Ni,Zn and in Bi(2)S r(1.6)La(0.4)Cu(1-z)M(z)O(6+delta) (Bi-2201) with M=Co,Zn under variat ion of the hole concentration p. We found a distinct behaviour between the underdoped and overdoped side of the T-c-p phase diagram. Only in the overdoped regime, T-c is scaling as T-c(p, z) = T-c(p, 0)g(z) wit h a p-independent scaling function g(z). We demonstrate the universali ty of this distinction in p-type high-T-c cuprates by comparison with publications on the La-214 and Y-123 systems and apply the scaling law to compare Bi2Sr2Ca(Cu1-zCoz)(2)O-8+delta with the intercalation comp ound IBi2Sr2Ca(Cu1-zCoz)(2)O-8+delta. The results are discussed from t he viewpoint of Abrikosov pair breaking, localization and phase fluctu ations.