′�?, which has a frequency of 295 cm−one, is attributed to the stretching vibration of Ga–Se bonds. The 2-phonon absorption with the 295 cm−1 phonon corresponds to the crystal IR absorption edge, instead of the residual absorption peak. Density useful concept computations display that the residual absorption with the BGSe https://williamd681ddc3.theideasblog.com/profile