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Anharmonic line shift and linewidth of the Raman modes in GaS0.75Se0.25 layered crystals
Date
2002-11-01
Author
Hasanlı, Nızamı
Metadata
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The frequencies and linewidths of five Raman-active modes in a GaS0.75Se0.25 layered crystal have been measured in the 10-300 K temperature range and in the 10-380 cm(-1) frequency region. We observed softening and broadening of the optical phonon lines with increasing temperature. The analysis of the experimental data showed that the temperature dependencies of frequencies and linewidths are well described by considering the contributions from thermal expansion and lattice anharmonicity. The purely anharmonic contribution (phonon-phonon coupling) is found to be due to three-phonon processes.
Subject Keywords
Electronic, Optical and Magnetic Materials
,
Condensed Matter Physics
URI
https://hdl.handle.net/11511/46033
Journal
PHYSICA STATUS SOLIDI B-BASIC RESEARCH
DOI
https://doi.org/10.1002/1521-3951(200211)234:2<665::aid-pssb665>3.0.co;2-2
Collections
Department of Physics, Article
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N. Hasanlı, “Anharmonic line shift and linewidth of the Raman modes in GaS0.75Se0.25 layered crystals,”
PHYSICA STATUS SOLIDI B-BASIC RESEARCH
, pp. 665–673, 2002, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46033.