′�?, by using a frequency of 295 cm−1, is attributed for the stretching vibration of Ga–Se bonds. The 2-phonon absorption in the 295 cm−1 phonon corresponds to your crystal IR absorption edge, rather then the residual absorption peak. Density useful idea computations show the residual absorption of your BGSe crystal https://sethpxaad.activoblog.com/34954842/rumored-buzz-on-baga4se7-crystal