Suppression of Octahedral Tilts and Associated Changes in Electronic Properties at Epitaxial Oxide Heterostructure Interfaces

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Borisevich, A.Y. and Chang, H.J. and Huijben, M. and Oxley, M.P. and Okamoto, S. and Niranjan, M.K. and Burton, J.D. and Tsymbal, E.Y. and Chu, Y.-H. and Yu, P. and Ramesh, R. and Kalinin, S.V. and Pennycook, S.J. (2010) Suppression of Octahedral Tilts and Associated Changes in Electronic Properties at Epitaxial Oxide Heterostructure Interfaces. Physical Review Letters, 105 (8). 087204. ISSN 0031-9007

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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-La0.7Sr0.3MnO3 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.

Item Type:Article
Copyright:© 2010 The American Physical Society
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/75243
Official URL:http://dx.doi.org/10.1103/PhysRevLett.105.087204
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Metis ID: 273046