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The effects of non-magnetic iso-valent defects inside the CuO2 plane(s) onsuperconducting transition temperature, Tc, dc charge transport, and the bulkmagnetic susceptibility, \c{hi}(T), were investigated for theYBa2(Cu1-yZny)3O7-d (Zn-YBCO) and La2-xSrxCu1-yZnyO4 (Zn-LSCO) superconductorsover a wide range of hole concentrations, p, and Zn contents (y) in the CuO2plane(s). From the analysis of the \c{hi}(T, y) data, the pseudogap energyscale, {\epsilon}g, was found to be almost independent of the defect content ata given value of p. The Zn induced rate of suppression of Tc, dTc(p)/dy, wasfound to be strongly p-dependent and showed a systematic variation with holeconcentration, except in the vicinity of p ~ 0.125, i.e., near the so-called1/8th anomaly where the charge and spin stripe orderings are at their strongestin various families of hole doped cuprates. Near p ~ 0.125, the static stripedcharge ordering is largely believed to dominate the T-p electronic phasediagram. dTc(p)/dy decreased strongly around this composition, i.e., Znabruptly became less effective in degrading Tc when p ~ 0.125. Thisobservation, together with the facts that (i) Zn suppresses Tc most effectivelyand (ii) the characteristic pseudogap energy scale remains insensitive to thelevel of Zn substitution, provide us with important clues regarding the natureand interplay of the underlying electronic correlations present in high-Tccuprates. We have discussed the possible connections among the stripe ordering,superconducting correlations and the pseudogap phenomenon in details in view ofthe above findings.

Effects of non-magnetic defects in hole doped cuprates: exploration of the roles of the underlying electronic correlations