′�?, using a frequency of 295 cm−one, is attributed towards the stretching vibration of Ga–Se bonds. The 2-phonon absorption of your 295 cm−1 phonon corresponds towards the crystal IR absorption edge, as opposed to the residual absorption peak. Density purposeful concept computations present which the residual absorption on the BGSe https://baga4se7-crystal80235.angelinsblog.com/32026035/new-step-by-step-map-for-baga4se7-crystal