′�?, with a frequency of 295 cm−1, is attributed to the stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−1 phonon corresponds to your crystal IR absorption edge, rather then the residual absorption peak. Density useful principle computations present which the residual absorption on the BGSe crystal https://heywoods888iwi3.sharebyblog.com/profile