| Abstract: | The linewidths of Raman‐active intralayer compressional modes in GaS1‐xSex layered mixed crystals (0 ≤ x ≤ 1) have been measured in the 10‐300 K temperature range to study the anharmonic effect as a function of compositional variation and temperature. It was found that the anharmonicity increases with an increase in substitutional disorder. The cubic (three‐phonon) processes with energy conservation is responsible for the anharmonic contribution to the broadening of the intralayer phonon lines with temperature. (© 2003 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
