Antiferromagnetism and superconductivity in cuprates

Abstract A microscopical theory of superconducting pairing within the p–d Hubbard model is reviewed. The results for d-wave symmetry gap function and T c for different hole concentrations are presented. The retardation effects for the superexchange pairing are unimportant due to large interband excitation energy that results in the pairing of all electrons in the conduction band and high T c ∝ E F . The spin-fluctuation pairing mediated by kinematic interaction in the intraband hopping further enhances T c .