′�?, by using a frequency of 295 cm−one, 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 idea computations demonstrate that the residual absorption with the BGSe https://baga4se7-crystal97397.theideasblog.com/33289051/rumored-buzz-on-baga4se7-crystal