′�?, using a frequency of 295 cm−1, is attributed to your stretching vibration of Ga–Se bonds. The two-phonon absorption from the 295 cm−one phonon corresponds on the crystal IR absorption edge, as opposed to the residual absorption peak. Density practical idea computations demonstrate which the residual absorption from the BGSe https://baga4se7-crystal80134.isblog.net/considerations-to-know-about-baga4se7-crystal-49955013