Oxygen polyvacancy in anatas as a filament: First principle investigation

We investigate oxygen-deficient anatase using quantum-chemical simulation within the density functional theory. It was found that the most energetically favorable spatial configuration of an oxygen polyvacancy is a three-dimensional chain in crystallographic direction [100] or [010]. The ability of oxygen polyvacancy in the form of a chain to act as a conductive filament and to participate in the resistive switching is discussed.