′�?, having a frequency of 295 cm−one, is attributed into the stretching vibration of Ga–Se bonds. The 2-phonon absorption in the 295 cm−one phonon corresponds towards the crystal IR absorption edge, as opposed to the residual absorption peak. Density practical principle computations demonstrate which the residual absorption with the BGSe https://manuelckqpl.estate-blog.com/31971157/new-step-by-step-map-for-baga4se7-crystal