′�?, having a frequency of 295 cm−1, is attributed to your stretching vibration of Ga–Se bonds. The two-phonon absorption from the 295 cm−1 phonon corresponds into the crystal IR absorption edge, in lieu of the residual absorption peak. Density practical idea computations exhibit that the residual absorption of your BGSe https://baga4se7-crystal63063.dsiblogger.com/65735780/baga4se7-crystal-an-overview