′�?, that 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−1 phonon corresponds into the crystal IR absorption edge, rather then the residual absorption peak. Density useful theory computations clearly show the residual absorption of the BGSe https://baga4se7-crystal30730.mdkblog.com/38576915/helping-the-others-realize-the-advantages-of-baga4se7-crystal