20 April 1998 Structural peculiarities and phonon spectra of A3B2C9 compounds: a Raman-scattering diagnostic
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Proceedings Volume 3359, Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics 1997; (1998) https://doi.org/10.1117/12.306246
Event: International Conference on Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics, 1997, Kiev, Ukraine
Abstract
In presented work the Raman spectra of the family of ferroelectric crystals A3B2C9, (here A equals Cs, Rb; B equals Sb, Bi; C equals Br) are given and the assignment of some high frequency bands is fulfilled. The conclusion about possible difference of structure of the crystals Rb3Bi2Br9 and Rb3Sb2Br9 from well known and detaily investigated structure of Cs3Bi2Br9 crystal is made. We also suggest that significant variation of spectra in the temperature region 110 - 300 K can be not only due to phase transition effects but also owing to anharmonic Fermi resonance between one- and two phonon excitations.
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Mikhail P. Lisitsa, Mikhail P. Lisitsa, Eugen Yu. Peresh, Eugen Yu. Peresh, O. V. Trylis, O. V. Trylis, Anatoli M. Yaremko, Anatoli M. Yaremko, } "Structural peculiarities and phonon spectra of A3B2C9 compounds: a Raman-scattering diagnostic", Proc. SPIE 3359, Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics 1997, (20 April 1998); doi: 10.1117/12.306246; https://doi.org/10.1117/12.306246
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