′�?, that has a frequency of 295 cm−one, is attributed into the stretching vibration of Ga–Se bonds. The two-phonon absorption of the 295 cm−one phonon corresponds for the crystal IR absorption edge, as opposed to the residual absorption peak. Density functional principle computations demonstrate that the residual absorption of the https://manueljrsrn.atualblog.com/38928249/baga4se7-crystal-options