TY - JOUR
AU - A.Y Borisevich
AU - A.R Lupini
AU - J He
AU - E.A Eliseev
AU - A.N Morozovska
AU - G.S Svechnikov
AU - P Yu
AU - Y.-H Chu
AU - Ramamoorthy Ramesh
AU - S.T Pantelides
AU - S.V Kalinin
AU - S.J Pennycook
AB - 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.
BT - Physical Review B - Condensed Matter and Materials Physics
DO - 10.1103/PhysRevB.86.140102
LA - eng
M1 - 14
N1 - cited By 38
N2 - 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.
PY - 2012
T2 - Physical Review B - Condensed Matter and Materials Physics
TI - Interface dipole between two metallic oxides caused by localized oxygen vacancies
VL - 86
SN - 10980121
ER -