DETAILS, FICTION AND BAGA4SE7 CRYSTAL

′�?, having a frequency of 295 cm−1, is attributed for the stretching vibration of Ga–Se bonds. The two-phonon absorption in the 295 cm−1 phonon corresponds to the crystal IR absorption edge, as opposed to the residual absorption peak. Density practical idea computations exhibit the residual absorption in the BGSe crystal originates from