′�?, having a frequency of 295 cm−one, is attributed to the stretching vibration of Ga–Se bonds. The two-phonon absorption of your 295 cm−one phonon corresponds to your crystal IR absorption edge, in lieu of the residual absorption peak. Density functional idea computations show that the residual absorption on the BGSe https://gunnerrttlx.blogzag.com/76675179/details-fiction-and-baga4se7-crystal