Parameters of Nuclear Quadrupole Interaction and Spatial Distribution of Electronic Defects in YBa2Cu3O7 and La2–xSrxCuO4 Lattices

Abstract

The comparison of calculated and experimental parameters of nuclear quadrupole interaction in the sites of crystal lattice of YBa₂Cu₃O₇ and La_2–xSr_xCuO₄ superconducting copper metal oxides has shown that effective charges of all atoms of superconducting ceramic lattices correspond to standard rates of their oxidation, except the atoms of chain and planar oxygen in YBa₂Cu₃O₇ lattice and atoms of planar oxygen in La_2–xSr_xCuO₄ lattice, whose decreased charge is interpreted as a result of hole localization in the corresponding sublattices.