′�?, by using a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−1 phonon corresponds towards the crystal IR absorption edge, as opposed to the residual absorption peak. Density practical concept computations clearly show which the residual absorption on https://baga4se7-crystal97418.blogzag.com/76666260/baga4se7-crystal-an-overview