DYNAMICAL EFFECT CORRECTIONS TO HOLE SELF-ENERGIES IN CUO2 PLANES

The total density of states for the three-band Hubbard model of CuO2 p lanes is calculated including fully self-consistent second-order pertu rbative corrections to the self-energy at the copper orbitals. We appl y a configurational mixing approach in a Bethe-lattice formulation to evaluate these quantum fluctuations in a local approximation. For real istic values of the model parameters we obtain a destruction of the an tiferromagnetism at a small dopant hole concentration of 3-5% due to t he occurrence of a spin disordered state with local moments. The charg e transfer gap is slightly reduced as compared with the Hartree-Fock r esults due to the incorporated dynamical effects.