′�?, having a frequency of 295 cm−1, is attributed to your stretching vibration of Ga–Se bonds. The two-phonon absorption from the 295 cm−one phonon corresponds into the crystal IR absorption edge, rather than the residual absorption peak. Density purposeful principle computations present that the residual absorption from the BGSe crystal https://antoniog925opn8.wikirecognition.com/user