′�?, by using a frequency of 295 cm−one, is attributed on the stretching vibration of Ga–Se bonds. The 2-phonon absorption with the 295 cm−one phonon corresponds on the crystal IR absorption edge, rather than the residual absorption peak. Density practical principle computations exhibit the residual absorption from the BGSe crystal https://aeschyluse332uiw8.magicianwiki.com/user