LiOsO3 undergoes a continuous transition from a centrosymmetric structure to a polar R3c structure at Ts = 140 K. By combining transport measurements and first-principles calculations, we find that Ts is enhanced by applied pressures, and it reaches a value of ∼250 K at ∼6.5 GPa. The enhancement is due to the fact that the polar R3c structure of LiOsO3 has a smaller volume than the centrosymmetric structure. Pressure generically favors the structure with the smallest volume, and therefore further stabilizes the polar R3c structure over the structure, leading to the increase in Ts.
Pressure-induced enhancement of non-polar to polar transition temperature in metallic LiOsO3
Esteban I. Paredes Aulestia, Yiu Wing Cheung, Yue-Wen Fang, Jianfeng He, Kazunari Yamaura, Kwing To Lai, Swee K. Goh, Hanghui Chen; Pressure-induced enhancement of non-polar to polar transition temperature in metallic LiOsO3. Appl. Phys. Lett. 2 July 2018; 113 (1): 012902. https://doi.org/10.1063/1.5035133
Download citation file: