Role of complex energy landscapes and strains in multiscale inhomogeneities in perovskite manganites

K. H. Ahn, T. F. Seman, T. Lookman, A. R. Bishop

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Abstract

We analyze the essential role played by complex energy landscapes in the nanometer- to micron-scale inhomogeneities observed in perovskite manganites using a model expressed in terms of symmetrized atomic-scale lattice distortion modes. We also examine the stability of large metal and insulator domains in the absence of defects. Our results demonstrate that an intrinsic mechanism, which involves long-range interactions between strain fields, the Peierls-Nabarro energy barrier, and complex energy landscapes with multiple metastable states, rather than an extrinsic mechanism such as chemical randomness, is responsible for the inhomogeneity in perovskite manganites.

Original languageEnglish (US)
Article number144415
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume88
Issue number14
DOIs
StatePublished - Oct 17 2013

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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