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Updated: Jun 20, 2026

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
A Ternary Reconstruction on the SrTiO3(001) Surface
Siyu Wu1, Changming Zhao1, Chao He1
1Department of Physics, State Key Laboratory of Quantum Functional Materials, and Guangdong Basic Research Center of Excellence for Quantum Science, Southern University of Science and Technology, Shenzhen 518055, China.
Abstract:
We revisit the well-studied 2 × 1 SrTiO3(001) surface, long presumed to adopt a double-layer TiO2 reconstruction, and propose a fundamentally new structural model. By combining evolutionary algorithms for global optimization, density-functional theory calculations, and experimental insights, we uncover a ternary surface reconstruction that exhibits substantially lower surface energy under typical experimental conditions compared to previously proposed models. This newly identified structure aligns closely with high-resolution electron microscopy (HREM) observations and explains the experimentally observed Sr precipitation on the surface. Moreover, it can be extended to the BaTiO3(001) surface, suggesting broader implications for similar perovskite systems. Our findings challenge the prevailing understanding of this surface and offer a fresh perspective that may reshape interpretations of surface properties and interactions in perovskite oxides.
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