′�?, that has a frequency of 295 cm−one, is attributed to the stretching vibration of Ga–Se bonds. The 2-phonon absorption from the 295 cm−1 phonon corresponds for the crystal IR absorption edge, in lieu of the residual absorption peak. Density functional idea computations show the residual absorption of your BGSe https://harryy100obn5.blogacep.com/37682819/baga4se7-crystal-options