′�?, that has a frequency of 295 cm−one, is attributed to the stretching vibration of Ga–Se bonds. The 2-phonon absorption of the 295 cm−1 phonon corresponds towards the crystal IR absorption edge, rather then the residual absorption peak. Density purposeful principle computations demonstrate the residual absorption with the BGSe crystal https://kingd812byv1.jts-blog.com/profile