′�?, by using a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption with the 295 cm−one phonon corresponds to the crystal IR absorption edge, in lieu of the residual absorption peak. Density practical principle computations clearly show which the residual absorption of https://milondpcn.luwebs.com/33459410/the-smart-trick-of-baga4se7-crystal-that-no-one-is-discussing