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Control of octahedral rotations in (LaNiO3)(n)/(SrMnO3)(m) superlattices
Journal article   Open access   Peer reviewed

Control of octahedral rotations in (LaNiO3)(n)/(SrMnO3)(m) superlattices

S. J. May, C. R. Smith, J. -W. Kim, E. Karapetrova, A. Bhattacharya, P. J. Ryan and Argonne National Lab. (ANL), Argonne, IL (United States)
Physical review. B, v 83(15)
19 Apr 2011
DOI: https://doi.org/10.1103/PhysRevB.83.153411
url
http://arxiv.org/abs/1102.3473View
SubmittedOpen Access (License Unspecified),  Open

Abstract

Materials Science Materials Science, Multidisciplinary Physical Sciences Physics Physics, Applied Physics, Condensed Matter Science & Technology Technology
Oxygen octahedral rotations have been measured in short-period (LaNiO3)(n)/(SrMnO3)(m) superlattices using synchrotron diffraction. The in-plane and out-of-plane bond angles and lengths are found to systematically vary with superlattice composition. Rotations are suppressed in structures with m > n, producing a nearly unrotated form of LaNiO3. Large rotations are present in structures with m < n, leading to reduced bond angles in SrMnO3. The metal-oxygen-metal bond lengths decrease as rotations are reduced, in contrast to behavior previously observed in strained, single-layer films. This result demonstrates that superlattice structures can be used to stabilize nonequilibrium octahedral behavior in a manner distinct from epitaxial strain, providing a novel means to engineer the electronic and ferroic properties of oxide heterostructures.

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Domestic collaboration
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Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
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