′�?, by using a frequency of 295 cm−one, is attributed to your stretching vibration of Ga–Se bonds. The two-phonon absorption from the 295 cm−one phonon corresponds for the crystal IR absorption edge, rather than the residual absorption peak. Density functional principle computations show that the residual absorption on the BGSe https://claytonacavr.dbblog.net/5979657/rumored-buzz-on-baga4se7-crystal