Influence of nonmagnetic impurities on spin correlations in high-Tc superconductors

Abstract We study the influence of oxygen vacancies on the magnetic property of the CuO 2 plane, on the basis of the d–p model, within the fluctuation exchange approximation and the coherent potential approximation. The antiferromagnetic spin fluctuation of d-electrons is suppressed by the oxygen vacancies, as well as the nonmagnetic impurities at the Cu sites.