Comment on ‘‘Silent soft mode in hexagonal barium titanate observed by hyper-Raman scattering’’
- 15 August 1989
- journal article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 40 (6) , 4198-4200
- https://doi.org/10.1103/physrevb.40.4198
Abstract
The soft zone-center mode was recently observed by means of hyper-Raman scattering by Inoue et al. [Phys. Rev. B 38, 6352 (1988)]. Knowing that the mode drives the transition, we obtain the lower-symmetry space group of the transition, construct the free energy (including elastic coupling), and show the possible optical modes allowed by symmetry.
Keywords
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