Stability of the d-wave pairing with respect to the intersite Coulomb repulsion in cuprate superconductors

Val'kov, V. V.; Dzebisashvili, D. M.; Korovushkin, M. M.; Barabanov, A. F. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 440 123-126; Doi: 10.1016/j.jmmm.2016.12.090 OCT 15 2017

Within the spin-fermion model for cuprate superconductors, the influence of the intersite Coulomb interactions V₂ and ${V'}_{2}$ between holes located at the next-nearest-neighbor oxygen ions of CuO₂ plane on the implementation of the $d_{x^{2} - y^{2}}$ -wave pairing is studied. It is shown that d-wave pairing can be suppressed only for unphysically large values of V₂ and ${V'}_{2}$ .