′�?, which has a frequency of 295 cm−one, is attributed towards the stretching vibration of Ga–Se bonds. The two-phonon absorption in the 295 cm−1 phonon corresponds to the crystal IR absorption edge, instead of the residual absorption peak. Density useful concept computations demonstrate the residual absorption of your BGSe crystal https://baga4s7crystal39515.thelateblog.com/33314418/detailed-notes-on-baga4se7-crystal