′�?, that has a frequency of 295 cm−one, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption from the 295 cm−one phonon corresponds on the crystal IR absorption edge, instead of the residual absorption peak. Density purposeful principle computations present the residual absorption from the BGSe crystal https://baga4se7crystal69013.bloginder.com/33412492/what-does-baga4se7-crystal-mean