′�?, having a frequency of 295 cm−one, is attributed on the stretching vibration of Ga–Se bonds. The 2-phonon absorption of your 295 cm−1 phonon corresponds into the crystal IR absorption edge, as opposed to the residual absorption peak. Density purposeful principle computations show the residual absorption in the BGSe crystal https://alexisikkjg.elbloglibre.com/32595638/baga4se7-crystal-options