Suppression of octahedral tilts and associated changes in electronic properties at epitaxial oxide heterostructure interfaces
Publication Type
Journal Article
Authors
Borisevich, A.Y, H.J Chang, M Huijben, M.P Oxley, S Okamoto, M.K Niranjan, J.D Burton, E.Y Tsymbal, Y.H Chu, P Yu, Ramamoorthy Ramesh, S.V Kalinin, S.J Pennycook
DOI
Abstract
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.
Journal
Physical Review Letters
Volume
105
Year of Publication
2010
ISSN
00319007
Notes
cited By 253