′�?, having a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The 2-phonon absorption in the 295 cm−1 phonon corresponds for the crystal IR absorption edge, instead of the residual absorption peak. Density purposeful concept computations display that the residual absorption with the BGSe crystal https://messiahnubda.snack-blog.com/32770410/a-secret-weapon-for-baga4se7-crystal