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Local crystal symmetry and structure at CaTiO3 twin boundaries
- Source :
- Applied Physics Letters. 118:092901
- Publication Year :
- 2021
- Publisher :
- AIP Publishing, 2021.
-
Abstract
- The local crystal symmetry and crystal structure at CaTiO3 twin boundaries were examined using convergent-beam electron diffraction (CBED). CBED patterns obtained right at the twin boundaries exhibited one mirror symmetry not observed in the bulk form. Two types of crystal structures were identified at the boundaries on different boundary widths and symmetry breaking. Quantitative analysis using CBED patterns revealed atomic shifts of Ti and Ca. A distortion of oxygen octahedra was also produced, which was smaller than the corresponding distortion obtained in the bulk form. The refined crystal structure conforms to the polar structure expected only at CaTiO3 twin boundaries.
- Subjects :
- 010302 applied physics
Materials science
Physics and Astronomy (miscellaneous)
Condensed matter physics
Structure (category theory)
Boundary (topology)
02 engineering and technology
Crystal structure
021001 nanoscience & nanotechnology
01 natural sciences
Electron diffraction
Condensed Matter::Superconductivity
Distortion
Polar structure
0103 physical sciences
Symmetry breaking
0210 nano-technology
Mirror symmetry
Subjects
Details
- ISSN :
- 10773118 and 00036951
- Volume :
- 118
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters
- Accession number :
- edsair.doi...........f3460edb04add7d87564665008ca34dc
- Full Text :
- https://doi.org/10.1063/5.0043851