′�?, having a frequency of 295 cm−one, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption in the 295 cm−one phonon corresponds into the crystal IR absorption edge, instead of the residual absorption peak. Density purposeful principle computations show which the residual absorption of your BGSe crystal https://fernandokswtm.activablog.com/32029965/baga4se7-crystal-an-overview