′�?, using a frequency of 295 cm−one, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption from the 295 cm−1 phonon corresponds to the crystal IR absorption edge, rather than the residual absorption peak. Density functional idea computations clearly show which the residual absorption on the BGSe https://alfredd825prp9.wikinewspaper.com/user