Abstract
Using the DFT-HF hybrid LCAO approach as implemented in the CRYSTAL computer code, we have performed large supercell comparative calculations of neutral O vacancies ( F centers) in the bulk and on the (001) surface of three cubic perovskite crystals (SrTiO 3, PbTiO 3, and PbZrO 3). The local lattice relaxation, charge redistribution, and positions of defect energy levels within the band gap are compared. It is shown that the difference in the chemical composition of host materials leads to quite different defect properties.
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