Abstract
The interplay between superconductivity (SC) and anti-ferromagnetism (AFM) is studied in strongly correlated systems: R 2− x M x CuO 4 (R=Nd, La, Pr, Gd; M=Sr, Ce). It is assumed that SC arises due to BCS pairing mechanism in the presence of AFM in Cu lattices of Cu–O planes. Temperature dependence of SC gap as well as staggered magnetic field are calculated analytically and solved self-consistently with respect to half-filled band situation for different model parameters ( λ 1 and λ 2 being the SC and AFM coupling parameters, respectively). The SC gap is studied in the co-existent phase of SC and AFM.
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