′�?, that has a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption on the 295 cm−1 phonon corresponds to the crystal IR absorption edge, instead of the residual absorption peak. Density purposeful principle computations present that the residual absorption of the BGSe https://juliof158zer0.ouyawiki.com/user