′�?, using a frequency of 295 cm−1, is attributed for the stretching vibration of Ga–Se bonds. The two-phonon absorption in the 295 cm−1 phonon corresponds into the crystal IR absorption edge, rather then the residual absorption peak. Density practical principle computations demonstrate that the residual absorption of your BGSe crystal https://sethayuxw.full-design.com/examine-this-report-on-baga4se7-crystal-74967843