′�?, using a frequency of 295 cm−one, is attributed for 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 than the residual absorption peak. Density purposeful idea computations clearly show that the residual absorption on the BGSe https://baga4se7-crystal91356.widblog.com/87449603/baga4se7-crystal-an-overview