′�?, using a frequency of 295 cm−one, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption on the 295 cm−one phonon corresponds towards the crystal IR absorption edge, rather then the residual absorption peak. Density purposeful principle computations demonstrate that the residual absorption of the BGSe crystal https://baga4se7crystal20739.estate-blog.com/31896403/considerations-to-know-about-baga4se7-crystal