Topological defects at octahedral tilting plethora in bi-layered perovskites
Materials Science
2017-03-10 v2
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.
Keywords
Cite
@article{arxiv.1606.01203,
title = {Topological defects at octahedral tilting plethora in bi-layered perovskites},
author = {F. -T. Huang and B. Gao and J. -W. Kim and X. Luo and Y. Wang and M. -W. Chu and C. -K. Chang and H. -S. Sheu and S. -W. Cheong},
journal= {arXiv preprint arXiv:1606.01203},
year = {2017}
}
Comments
12 pages, 4 figures