′�?, using a frequency of 295 cm−1, is attributed to the stretching vibration of Ga–Se bonds. The 2-phonon absorption from the 295 cm−1 phonon corresponds into the crystal IR absorption edge, rather then the residual absorption peak. Density useful theory computations show the residual absorption from the BGSe crystal originates https://theodorn766dpb0.wikipublicist.com/user