′�?, having a frequency of 295 cm−1, is attributed towards the stretching vibration of Ga–Se bonds. The 2-phonon absorption of your 295 cm−one phonon corresponds to your crystal IR absorption edge, rather then the residual absorption peak. Density purposeful concept computations present that the residual absorption of your BGSe crystal https://baga4se7-crystal75062.blogunteer.com/31554531/the-ultimate-guide-to-baga4se7-crystal