′�?, by using a frequency of 295 cm−1, is attributed for the stretching vibration of Ga–Se bonds. The two-phonon absorption of your 295 cm−one phonon corresponds for the crystal IR absorption edge, instead of the residual absorption peak. Density purposeful idea computations demonstrate the residual absorption from the BGSe crystal https://baga4se7crystal18406.bloggactif.com/33879019/5-tips-about-baga4se7-crystal-you-can-use-today