RAMAN-SPECTROSCOPY OF SOFT AND RIGID MODES IN FERROELECTRIC TLINS2
| Autor: | M. P. Yakheev, A. P. Ryabov, N. N. Melnik, E. A. Vinogradov, Nizami Gasanly, V. M. Burlakov |
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| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Phase transition Condensed matter physics Mineralogy Soft modes Condensed Matter Physics Ferroelectricity Electronic Optical and Magnetic Materials symbols.namesake chemistry Phase (matter) symbols Raman spectroscopy Inorganic compound Single crystal Raman scattering |
| Popis: | Low-frequency Raman spectra of a TlInS2 single crystal in the vicinity of a ferroelectric phase transition are reported. In the ferroelectric phase a soft mode interacting with some rigid modes is observed. The temperature dependence of the soft mode frequency is found to be proportional to (Tc – T)1/2. An unusual behaviour of the rigid mode (ω = 20 cm−1) is observed. This fact is interpreted in terms of inherent lattice defects which cause nonhomogeneous broadening. [Russian Text Ignored]. |
| Databáze: | OpenAIRE |
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