Substitution for Cu in the electron-doped infinite-layer superconductor Sr0.9La0.1CuO2, BCS-like behavior for Tc reduction

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  • 21 June 2001
Abstract
We report on the effect of substitution for Cu on Tc of electron-doped infinite-layer superconductors Sr0.9La0.1Cu1-xRxO2, R = Zn and Ni. We found that Tc was nearly constant until x = 0.03 for R = Zn, while superconductivity was nearly suppressed for x = 0.02 with dTc/dx = 20 K/% for R = Ni. This behavior is very similar to that of BCS-like superconductors, in sharp contrast with those of all the other high-Tc cuprates. These findings are discussed in terms of the superconducting gap symmetry in the cuprate superconductors including another electron-doped superconductor, (Nd,Ce)2CuO4-y.

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