′�?, having a frequency of 295 cm−1, is attributed towards the stretching vibration of Ga–Se bonds. The 2-phonon absorption from the 295 cm−one phonon corresponds for the crystal IR absorption edge, rather than the residual absorption peak. Density functional theory computations exhibit that the residual absorption in the BGSe crystal https://alfredd825prp9.wikinewspaper.com/user