′�?, that has a frequency of 295 cm−one, is attributed to the stretching vibration of Ga–Se bonds. The 2-phonon absorption in the 295 cm−1 phonon corresponds into the crystal IR absorption edge, rather than the residual absorption peak. Density purposeful principle computations present which the residual absorption of your BGSe https://fernandoajnoo.bloggazzo.com/31894561/considerations-to-know-about-baga4se7-crystal