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Pressure-induced enhancement of non-polar to polar transition temperature in metallic LiOsO$_3$
- Source :
- Appl. Phys. Lett. 113, 012902 (2018)
- Publication Year :
- 2018
-
Abstract
- LiOsO$_3$ undergoes a continuous transition from a centrosymmetric $R\bar{3}c$ structure to a polar $R3c$ structure at $T_s=140$~K. By combining transport measurements and first-principles calculations, we find that $T_s$ is enhanced by applied pressure, and it reaches a value of $\sim$250~K at $\sim$6.5~GPa. The enhancement is due to the fact that the polar $R3c$ structure of LiOsO$_3$ has a smaller volume than the centrosymmetric $R\bar{3}c$ structure. Pressure generically favors the structure with the smallest volume, and therefore further stabilizes the polar $R3c$ structure over the $R\bar{3}c$ structure, leading to the increase in $T_s$.<br />Comment: 5 pages and 4 figures
- Subjects :
- Condensed Matter - Materials Science
Subjects
Details
- Database :
- arXiv
- Journal :
- Appl. Phys. Lett. 113, 012902 (2018)
- Publication Type :
- Report
- Accession number :
- edsarx.1806.00639
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1063/1.5035133