′�?, using a frequency of 295 cm−1, is attributed towards the stretching vibration of Ga–Se bonds. The two-phonon absorption of your 295 cm−1 phonon corresponds towards the crystal IR absorption edge, rather than the residual absorption peak. Density purposeful concept computations show which the residual absorption from the BGSe crystal https://baga4se7-crystal81245.creacionblog.com/32491161/everything-about-baga4se7-crystal