′�?, 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 into the crystal IR absorption edge, rather then the residual absorption peak. Density useful concept computations show the residual absorption from the BGSe crystal originates https://martinzhjkk.theobloggers.com/39032504/considerations-to-know-about-baga4se7-crystal