Soft-Phonon Couplings in the Pressure-Induced Phase Transition in SbSI
- 1 February 1972
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 5 (3) , 1031-1034
- https://doi.org/10.1103/physrevb.5.1031
Abstract
The Raman spectra of the soft-phonon behavior in the ferroelectric transition in SbSI is studied by means of a new technique in which the phase transition is induced by hydrostatic pressure. The crystal temperature is maintained constant and the ferroelectric transition is created by a linear shift of the Curie temperature. Evidence is provided for the existence of two distinct mode couplings involving three phonons.Keywords
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