′�?, with a frequency of 295 cm−one, is attributed to your stretching vibration of Ga–Se bonds. The 2-phonon absorption in the 295 cm−1 phonon corresponds to your crystal IR absorption edge, in lieu of the residual absorption peak. Density practical theory computations demonstrate that the residual absorption with the BGSe https://baga4se7-crystal99741.blogdon.net/5-easy-facts-about-baga4se7-crystal-described-48868078