′�?, which has a frequency of 295 cm−1, is attributed to your stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−1 phonon corresponds towards the crystal IR absorption edge, instead of the residual absorption peak. Density purposeful principle computations display which the residual absorption on the BGSe https://baga4se7-crystal05936.bloggip.com/32868053/details-fiction-and-baga4se7-crystal