′�?, which has a frequency of 295 cm−one, is attributed towards the stretching vibration of Ga–Se bonds. The two-phonon absorption with the 295 cm−1 phonon corresponds on the crystal IR absorption edge, rather then the residual absorption peak. Density functional theory computations clearly show the residual absorption of your BGSe https://dennisl259yce5.wikilinksnews.com/user