Temperature dependence of the first-order Raman phonon lines in GaS0.25Se0.75 layered crystals
ACTA PHYSICA POLONICA A, cilt.102, sa.6, ss.801-810, 2002 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 102 Sayı: 6
- Basım Tarihi: 2002
- Doi Numarası: 10.12693/aphyspola.102.801
- Dergi Adı: ACTA PHYSICA POLONICA A
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.801-810
- Orta Doğu Teknik Üniversitesi Adresli: Evet
Özet
Systematic measurements by Raman scattering. of the frequency and line width of the zone-center optical modes in GaS0.25Se0.75 layered crystal over the temperature, range of 10-300 K are carried out. The analysis of-temperature dependence of intralayer modes shows that frequency shift and line broadening are successfully modeled by including the contributions from thermal expansion and lattice anharmonicity. The purely anharmonic contribution (phonon-phonon coupling) is found to be due to three-phonon processes.