′�?, by using a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption of the 295 cm−one phonon corresponds for the crystal IR absorption edge, as opposed to the residual absorption peak. Density purposeful idea computations exhibit the residual absorption of your BGSe https://knoxmwyup.uzblog.net/about-baga4se7-crystal-46674237