1. Topological defects at octahedral tilting plethora in bi-layered perovskites
- Author
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Huang, F. -T., Gao, B., Kim, J. -W., Luo, X., Wang, Y., Chu, M. -W., Chang, C. -K., Sheu, H. -S., and Cheong, S. -W.
- Subjects
Condensed Matter - Materials Science - Abstract
Oxygen octahedral distortions including tilts/rotations, deformations and off-centering in (layered) perovskites play the key role in their numerous functional properties. At the polar-centrosymmetric phase boundary in bi-layered perovskite Ca3-xSrxTi2O7 with x~1, we found the presence of abundant topological Z8 vortex-antivortex pairs, associated with four oxygen octahedral tilts at domains and another four different oxygen octahedral tilts at domain boundaries. Our discovery opens a new revenue to unveil topological defects associated with various types of oxygen octahedral distortions., Comment: 12 pages, 4 figures
- Published
- 2016
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