′�?, using a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption with the 295 cm−one phonon corresponds into the crystal IR absorption edge, in lieu of the residual absorption peak. Density purposeful theory computations show the residual absorption of your BGSe crystal https://edgararfrd.blogvivi.com/33395193/baga4se7-crystal-options