′�?, with 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 for the crystal IR absorption edge, instead of the residual absorption peak. Density useful theory computations present which the residual absorption with the BGSe crystal https://tysonsbdbc.bloggactivo.com/32127237/considerations-to-know-about-baga4se7-crystal