′�?, that has a frequency of 295 cm−1, is attributed for the stretching vibration of Ga–Se bonds. The two-phonon absorption on the 295 cm−1 phonon corresponds on the crystal IR absorption edge, rather than the residual absorption peak. Density useful theory computations exhibit which the residual absorption with the BGSe https://anthonyn888kcw1.hazeronwiki.com/user