′�?, using a frequency of 295 cm−1, is attributed to your stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−1 phonon corresponds to the crystal IR absorption edge, rather than the residual absorption peak. Density purposeful concept computations display which the residual absorption in the BGSe crystal https://baga4se7-crystal95184.idblogmaker.com/31995778/rumored-buzz-on-baga4se7-crystal