′�?, using a frequency of 295 cm−1, is attributed towards the stretching vibration of Ga–Se bonds. The two-phonon absorption of the 295 cm−one phonon corresponds to your crystal IR absorption edge, rather then the residual absorption peak. Density purposeful principle computations present that the residual absorption of your BGSe crystal https://mariorhtfq.topbloghub.com/39118620/baga4se7-crystal-an-overview