′�?, using a frequency of 295 cm−1, is attributed towards the stretching vibration of Ga–Se bonds. The two-phonon absorption of your 295 cm−one phonon corresponds on the crystal IR absorption edge, instead of the residual absorption peak. Density purposeful principle computations present which the residual absorption of the BGSe crystal https://baga4se7crystal57801.blogitright.com/32902651/rumored-buzz-on-baga4se7-crystal