′�?, with a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−one phonon corresponds to the crystal IR absorption edge, rather then the residual absorption peak. Density useful theory computations display that the residual absorption from the BGSe crystal https://baga4se7-crystal95171.qodsblog.com/32823534/a-secret-weapon-for-baga4se7-crystal