A SIMPLE KEY FOR BAGA4SE7 CRYSTAL UNVEILED

′�?, having a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption from the 295 cm−one phonon corresponds into the crystal IR absorption edge, as an alternative to the residual absorption peak. Density purposeful idea computations clearly show that the residual absorption from the BGSe