′�?, using a frequency of 295 cm−1, is attributed to the 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 practical idea computations display that the residual absorption in the BGSe crystal https://baga4se7crystal95071.blogrelation.com/38620854/5-simple-techniques-for-baga4se7-crystal