Dependence of critical temperature on doping and oxygen reduction in Nd2-xCexCuO4-δ${\rm Nd}_{2{\hbox{-}}x}{\rm Ce}_x{\rm CuO}_{4{\hbox{-}}\delta}$ superconductor

Abstract

AbstractIn this work, we have investigated the possible dependence of critical temperature (Tc) on cerium doping and oxygen reduction in oxide superconductor 2‐xCexCu (LCCO, L = Nd, Eu Pr) by employing the Green's function (GF) technique. Besides, we have shown the interconnection between electron doping and subtle oxygen reduction variability in the system by using Tikhonov regularization method (TRM). Within the above methods, both parameters of superconducting critical temperature (Tc) and antiferromagnetic transition temperature (TN) are calculated quantitatively by considering the electron doping followed by annealing and magnetic ordering for NCCO system. It is demonstrated that when the magnetic ordering is applied, Tc is suppressed whereas TN is enhanced. On the other hand, for electron doping, the values of these parameters become vice‐versa. It is shown that, with further electron doping, the antiferromagnetic state leads to higher frustration. However, it subtly persists up to about, . The critical temperature of NCCO occurs in the range of between 0.05 and 0.27 with at The antiferromagnetic (AFM) phase and superconducting (SC) phase diagrams are established in compact form and the coexistence between the two states is demonstrated. The current finding is compatible with previous results.