′�?, by using a frequency of 295 cm−one, is attributed on the stretching vibration of Ga–Se bonds. The 2-phonon absorption with the 295 cm−one phonon corresponds for the crystal IR absorption edge, rather then the residual absorption peak. Density purposeful concept computations present that the residual absorption with the BGSe https://rowanltuvs.blogerus.com/54834239/baga4se7-crystal-an-overview