Variable energy positron annihilation lifetime spectroscopy of high-mobility La-doped SrTiO3 grown by molecular beam epitaxy found that the films contained sufficiently low concentrations of Sr vacancies and vacancy cluster defects to allow the observation of positron annihilation events from the perfect lattice. This enabled the concentrations of charged cation vacancies to be estimated, and these were found to be at least an order of magnitude below the La-dopant concentrations.
Skip Nav Destination
Research Article| December 06 2011
Suppression of vacancy defects in epitaxial La-doped SrTiO3 films
D. J. Keeble;
D. J. Keeble, B. Jalan, L. Ravelli, W. Egger, G. Kanda, S. Stemmer; Suppression of vacancy defects in epitaxial La-doped SrTiO3 films. Appl. Phys. Lett. 5 December 2011; 99 (23): 232905. https://doi.org/10.1063/1.3664398
Download citation file: