′�?, using a frequency of 295 cm−1, is attributed towards the stretching vibration of Ga–Se bonds. The two-phonon absorption with the 295 cm−one phonon corresponds to the crystal IR absorption edge, instead of the residual absorption peak. Density functional principle computations display which the residual absorption with the BGSe crystal https://baga4se7crystal95050.mybjjblog.com/considerations-to-know-about-baga4se7-crystal-45556983