′�?, using a frequency of 295 cm−1, is attributed towards the stretching vibration of Ga–Se bonds. The two-phonon absorption from the 295 cm−1 phonon corresponds for the crystal IR absorption edge, rather than the residual absorption peak. Density purposeful theory computations present which the residual absorption on the BGSe crystal https://baga4se7crystal37630.newsbloger.com/33256201/examine-this-report-on-baga4se7-crystal