A relationship between electronic structure effective parameters and Tc in monolayered cuprate superconductors

For a broad class of high-Tc superconductor cuprates with nearly independent Cu–O planes, the values of the parameters defining the t–J model Hamiltonian are obtained from accurate ab initio electronic structure calculations on embedded cluster models. From the calculated t and J values a clear-cut correlation between Tc and these values emerges. Based on the ideas of resonating-valence-bond (RVB) theory, a possible interpretation of the origin of this correlation is discussed. The present work stresses the adequacy of the t–J model and strongly supports the idea of a pairing mechanism in cuprates mediated by magnetic interactions.