′�?, having a frequency of 295 cm−1, is attributed for the stretching vibration of Ga–Se bonds. The two-phonon absorption with the 295 cm−1 phonon corresponds to the crystal IR absorption edge, instead of the residual absorption peak. Density purposeful concept computations show which the residual absorption in the BGSe crystal https://patrickm902zto7.fliplife-wiki.com/user