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The effect of Zn substitution on the superconducting transition temperature, Tc, was investigated for the La2−xSrxCu1−yZnyO4 (Zn-LSCO) compounds over a wide range of hole concentrations, p (), and Zn content (y) in the CuO2 plane. A Zn-induced rate of suppression of Tc, dTc(p)/dy, was found to be strongly p-dependent and showed a systematic variation with hole concentration, except in the vicinity of p~0.12, i.e. near the so-called 1/8th anomaly where the charge/spin stripe correlations are at their strongest in La2−xSrxCuO4. Near p~0.12, the static striped charge ordering is widely believed to dominate the T–p phase diagram. dTc(p)/dy decreased strongly around this hole concentration i.e. Zn became less effective in degrading Tc near p~0.12. This observation is indicative of an intricate and competing interplay among the superconducting, pseudogap, and stripe correlations in Zn substituted LSCO.

superconductor science and technology/superconductor science and technology

Effects of Zn substitution in La2−xSrxCu1−yZnyO4: interplay among superconductivity, pseudogap, and stripe order