′�?, with a frequency of 295 cm−one, is attributed to your stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−one phonon corresponds for the crystal IR absorption edge, rather then the residual absorption peak. Density useful theory computations clearly show the residual absorption of the BGSe crystal https://baga4se7-crystal64952.theisblog.com/32985926/5-tips-about-baga4se7-crystal-you-can-use-today