%0 Journal Article
%A A.Y Borisevich
%A A.R Lupini
%A J He
%A E.A Eliseev
%A A.N Morozovska
%A G.S Svechnikov
%A P Yu
%A Y.-H Chu
%A Ramamoorthy Ramesh
%A S.T Pantelides
%A S.V Kalinin
%A S.J Pennycook
%B Physical Review B - Condensed Matter and Materials Physics
%D 2012
%G eng
%R 10.1103/PhysRevB.86.140102
%T Interface dipole between two metallic oxides caused by localized oxygen vacancies
%V 86
%X Oxygen vacancies are increasingly recognized to play a role in phenomena observed at transition-metal oxide interfaces. Here, we report a study of SrRuO 3 and La 0.7Sr 0.3MnO 3 interfaces using a combination of quantitative aberration-corrected scanning transmission electron microscopy, electron energy-loss spectroscopy, and density functional calculations. Cation displacements are observed at the interface, indicative of a dipolelike electric field even though both materials are nominally metallic. The observed displacements are reproduced by theory if O vacancies are present in the near-interface La 0.7Sr 0.3MnO 3 layers. The results suggest that atomic-scale structural mapping can serve as a quantitative indicator of the presence of O vacancies at interfaces. © 2012 American Physical Society.