′�?, having a frequency of 295 cm−one, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption of your 295 cm−one phonon corresponds to your crystal IR absorption edge, rather then the residual absorption peak. Density useful theory computations present the residual absorption from the BGSe crystal originates https://baga4se7crystal37925.blogdon.net/baga4se7-crystal-options-48899053