La2-cursive Greek chiSrcursive Greek chiCu1-yZnyO4: Tc and ns/m* correlations seen with muon spin rotation

We report the muon spin rotation experiments on Zn substituted La1-cursive Greek chiSrcursive Greek chiCuO4, for four zinc concentrations y = 0.0, 0.0025, 0.005, 0.01, at strontium concentrations cursive Greek chi = 0.15, 0.20. We find that Tc in the optimally doped (cursive Greek chi = 0.15) and overdoped (cursive Greek chi = 0.20) 2:1:4 decreases linearly with increasing zinc concentration. Plotted against the planar zinc concentration, the Tc's of both series seem to fall on the same line. The superconducting carrier density/effective mass ratio, ns/m*, at first decreases linearly, rising above this line for higher zinc concentrations. This behavior may result from the localization of carriers in an area ξab around each zinc atom.