′�?, which has a frequency of 295 cm−one, is attributed to the stretching vibration of Ga–Se bonds. The 2-phonon absorption of your 295 cm−one phonon corresponds to your crystal IR absorption edge, instead of the residual absorption peak. Density purposeful theory computations demonstrate the residual absorption on the BGSe crystal https://baga4se7-crystal80234.bloguerosa.com/31862304/helping-the-others-realize-the-advantages-of-baga4se7-crystal