′�?, with a frequency of 295 cm−one, is attributed for the stretching vibration of Ga–Se bonds. The two-phonon absorption from the 295 cm−one phonon corresponds for the crystal IR absorption edge, as opposed to the residual absorption peak. Density functional idea computations demonstrate that the residual absorption of your BGSe https://baga4se7crystal30740.weblogco.com/32886628/detailed-notes-on-baga4se7-crystal