′�?, having a frequency of 295 cm−1, is attributed for the stretching vibration of Ga–Se bonds. The two-phonon absorption of your 295 cm−1 phonon corresponds towards the crystal IR absorption edge, as opposed to the residual absorption peak. Density functional idea computations demonstrate which the residual absorption from the BGSe https://carlosl039yjg8.robhasawiki.com/user