Temperature dependence of Raman-active modes of TIGaS2 layered crystals: An anharmonicity study

Date

2004-08-01

Author

Yuksek, N.s.
Hasanlı, Nızamı
Ozkan, H.
Aydinli, A.

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The temperature dependence (16 - 300 K) of unpolarized Raman spectra from TIGaS2 layered crystals was measured in the frequency range of 10 - 400 cm-1. The analysis of the experimental data showed that the temperature dependencies of the phonon frequencies and linewidths were well described by considering the contributions from thermal expansion and lattice anharmonicity. The anharmonic contribution (phonon-phonon coupling) was found to be due to three-phonon processes. The present work demonstrates that the interlayer Raman mode at 42.6 cm-1 shifts toward high frequency as the temperature is raised from 16 to 300 K.

Subject Keywords

Anharmonicity, Layered crystals, Phonon-phonon coupling, TIGaS2

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=4544352210&origin=inward
https://hdl.handle.net/11511/76600

Journal

Journal of the Korean Physical Society

Collections

Department of Physics, Article

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Citation Formats

N. s. Yuksek, N. Hasanlı, H. Ozkan, and A. Aydinli, “Temperature dependence of Raman-active modes of TIGaS2 layered crystals: An anharmonicity study,” Journal of the Korean Physical Society, pp. 501–506, 2004, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=4544352210&origin=inward.