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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

10.1103/PhysRevLett.105.087204

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

Research Areas

Ramesh Lab