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Large Isosymmetric Reorientation of Oxygen Octahedra Rotation Axes in Epitaxially Strained Perovskites
Journal article   Open access   Peer reviewed

Large Isosymmetric Reorientation of Oxygen Octahedra Rotation Axes in Epitaxially Strained Perovskites

James M. Rondinelli, Sinisa Coh and Argonne National Lab. (ANL), Argonne, IL (United States)
Physical review letters, v 106(23), pp 235502-235502
10 Jun 2011
PMID: 21770519
url
https://link.aps.org/accepted/10.1103/PhysRevLett.106.235502View
Published, Version of Record (VoR) Open

Abstract

Physical Sciences Physics Physics, Multidisciplinary Science & Technology
Using first-principles density functional theory calculations, we discover an anomalously large biaxial strain-induced octahedral rotation axis reorientation in orthorhombic perovskites with tendency towards rhombohedral symmetry. The transition between crystallographically equivalent (isosymmetric) structures with different octahedral rotation magnitudes originates from strong strain-octahedral rotation coupling available to perovskites and the energetic hierarchy among competing octahedral tilt patterns. By elucidating these criteria, we suggest many functional perovskites would exhibit the transition in thin film form, thus offering a new landscape in which to tailor highly anisotropic electronic responses.

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Physics, Multidisciplinary
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