′�?, using a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption from the 295 cm−1 phonon corresponds to your crystal IR absorption edge, rather then the residual absorption peak. Density purposeful concept computations show which the residual absorption on the BGSe crystal https://baga4se7-crystal51739.therainblog.com/31672640/the-smart-trick-of-baga4se7-crystal-that-nobody-is-discussing