%0 Journal Article
%K Electron energy loss spectroscopy
%K Transmission electron microscopy
%K Phase transitions
%K Oxygen
%K Manganese oxide
%K Scanning transmission electron microscopy
%K Oxide superlattices
%K Oxide interfaces
%K Electronic properties
%K Heterojunctions
%K Crystal symmetry
%K Energy dissipation
%K Phase interfaces
%K Mesoscopics
%K Unit cells
%K Lattice parameters
%K Antiferrodistortive
%K Heterostructure interfaces
%K Low loss
%K Octahedral rotations
%K Thin layers
%K Translational symmetry
%A A.Y Borisevich
%A H.J Chang
%A M Huijben
%A M.P Oxley
%A S Okamoto
%A M.K Niranjan
%A J.D Burton
%A E.Y Tsymbal
%A Y.H Chu
%A P Yu
%A Ramamoorthy Ramesh
%A S.V Kalinin
%A S.J Pennycook
%B Physical Review Letters
%D 2010
%G eng
%R 10.1103/PhysRevLett.105.087204
%T Suppression of octahedral tilts and associated changes in electronic properties at epitaxial oxide heterostructure interfaces
%V 105
%X Epitaxial oxide interfaces with broken translational symmetry have emerged as a central paradigm behind the novel behaviors of oxide superlattices. Here, we use scanning transmission electron microscopy to demonstrate a direct, quantitative unit-cell-by-unit-cell mapping of lattice parameters and oxygen octahedral rotations across the BiFeO3-La0.7Sr 0.3MnO3 interface to elucidate how the change of crystal symmetry is accommodated. Combined with low-loss electron energy loss spectroscopy imaging, we demonstrate a mesoscopic antiferrodistortive phase transition near the interface in BiFeO3 and elucidate associated changes in electronic properties in a thin layer directly adjacent to the interface. © 2010 The American Physical Society.