′�?, using a frequency of 295 cm−one, is attributed towards the stretching vibration of Ga–Se bonds. The 2-phonon absorption in the 295 cm−one phonon corresponds for the crystal IR absorption edge, instead of the residual absorption peak. Density useful theory computations demonstrate which the residual absorption in the BGSe crystal https://rowanvkxju.blogdal.com/32876517/detailed-notes-on-baga4se7-crystal