DETAILS, FICTION AND BAGA4SE7 CRYSTAL

′�?, by using a frequency of 295 cm−1, is attributed to the stretching vibration of Ga–Se bonds. The 2-phonon absorption in the 295 cm−1 phonon corresponds towards the crystal IR absorption edge, as opposed to the residual absorption peak. Density functional principle computations display the residual absorption in the BGSe crystal origin