Raman Scattering in Ferroelectric TlGaSe 2 . Soft Mode and Order Parameter
The Raman scattering spectra of soft and rigid modes in TlGaSe 2 are investigated over a wide temperature range. The interaction between soft and rigid modes is observed from the description of the experimental spectrum within a model of interacting harmonic oscillators. Temperature dependences of t...
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| Veröffentlicht in: | physica status solidi (b) 1989-01, Vol.151 (1), p.337-346 |
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| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | The Raman scattering spectra of soft and rigid modes in TlGaSe
2
are investigated over a wide temperature range. The interaction between soft and rigid modes is observed from the description of the experimental spectrum within a model of interacting harmonic oscillators. Temperature dependences of the soft mode frequency and halfwidth are confirmed. The splitting of the rigid Raman mode in the ferroelectric phase is also detected.
[Russian Text Ignore]. |
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| ISSN: | 0370-1972 1521-3951 |
| DOI: | 10.1002/pssb.2221510138 |