Atomic displacements at a ∑3(111) grain boundary in BaTiO3: A first-principles determination

W. T. Geng, Y. J. Zhao, Arthur J Freeman, B. Delley

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22 Citations (Scopus)


The atomic and electronic structure at a ∑3(111) grain boundary in BaTiO3 was investigated by the first-principles band-structure DMol3 total energy/atomic force method within the local-density approximation. Our first-principles calculations indicate an expansion of the nearest Ti-Ti spacing across the grain-boundary plane and a contraction of the nearest BaO-BaO spacing, in excellent agreement with the experimental observation of Jia and Thust [Phys. Rev. Lett. 82, 5052 (1999)]. An additional attraction of oxygen atoms to the nearest Ti atom pairs, as well as a small volume expansion, are also found at the grain boundary. The atomic displacements were explained with an electronic structure analysis.

Original languageEnglish
Article number060101
Pages (from-to)601011-601014
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number6
Publication statusPublished - 2001

ASJC Scopus subject areas

  • Condensed Matter Physics

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