′�?, which has a frequency of 295 cm−one, is attributed to your stretching vibration of Ga–Se bonds. The two-phonon absorption of your 295 cm−1 phonon corresponds to the crystal IR absorption edge, rather than the residual absorption peak. Density useful theory computations display the residual absorption of your BGSe crystal https://felixflmid.wssblogs.com/32770605/baga4se7-crystal-can-be-fun-for-anyone