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.

Topics
Density functional theory, Doping, Crystallographic defects, Crystal lattices, Epitaxy, Pulsed laser deposition, Positron annihilation spectroscopy, Thin films, Transition metal oxides, Stoichiometry
© 2011 American Institute of Physics.
2011
American Institute of Physics

Supplementary Material

Supplementary Material- zip file
You do not currently have access to this content.