ELECTRONIC-STRUCTURE OF THE 1X1 YBA2CU3O7 PRBA2CU3O7 SUPERLATTICE - ALOCAL-SPIN-DENSITY APPROXIMATION WITH ON-SITE COULOMB INTERACTION/

We performed self-consistent linear muffin-tin orbital atomic sphere a pproximation calculations of the electronic structure of the 1 x 1 YBa 2Cu3O7/PrBa2Cu3O7 (YBCO/PBCO) superlattice, based on the local-spin-de nsity approximation with on-site Coulomb correlation From our results, we can exclude that the experimentally observed depression of the cri tical temperature is originated intrinsically by a modification of the electronic structure of the CuO2 planes. We find that the charge tran sfer between YBCO and PBCO layers is one order lower than the value re quired to explain the strong depression of both the critical temperatu re T-c(onset) and the zero-resistance transition temperature T-c(0), w ithin the hole-filling model.