Critical regime and suppression of the pseudo-gap in Cu0.5Tl0.5Ba2Ca3Cu4−yZnyO12−δ superconductors via excess conductivity analyses

► We have carried out FIC analysis of Zn-doped (Cu0.5Tl0.5)-1234 superconductors. ► Tc, Tcmf, TG and T3D-2D are enhanced with increasing Zn concentration. ► Bc(0), Bc1(0) and Jc(0) are increased with the increased Zn doping. ► Due to the incorporation of Zn, charge density gap Δcg is marginally altered. ► Zn doping suppresses the anti-ferromagnetic order which suppresses Δsg and hence Δpg.