′�?, that has 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 for the crystal IR absorption edge, as opposed to the residual absorption peak. Density functional idea computations clearly show the residual absorption in the https://andersontjpra.review-blogger.com/54753016/examine-this-report-on-baga4se7-crystal