′�?, having a frequency of 295 cm−1, is attributed to the stretching vibration of Ga–Se bonds. The 2-phonon absorption with the 295 cm−1 phonon corresponds to the crystal IR absorption edge, rather then the residual absorption peak. Density useful theory computations clearly show the residual absorption of the BGSe crystal https://baga4se7-crystal02456.blogpayz.com/32794042/top-latest-five-baga4se7-crystal-urban-news