EXAMINE THIS REPORT ON BAGA4SE7 CRYSTAL

′�?, that has a frequency of 295 cm−one, is attributed on the stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−1 phonon corresponds to your crystal IR absorption edge, instead of the residual absorption peak. Density practical principle computations clearly show which the residual absorption with the BGSe crystal