′�?, that has a frequency of 295 cm−one, is attributed for the stretching vibration of Ga–Se bonds. The two-phonon absorption from the 295 cm−one phonon corresponds on the crystal IR absorption edge, rather then the residual absorption peak. Density functional theory computations present which the residual absorption in the BGSe https://baga4se7crystal96306.thechapblog.com/31935977/a-simple-key-for-baga4se7-crystal-unveiled