′�?, by using a frequency of 295 cm−one, is attributed into the stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−1 phonon corresponds to the crystal IR absorption edge, as opposed to the residual absorption peak. Density practical idea computations demonstrate the residual absorption from the BGSe https://finnxvpjb.bloggadores.com/31933921/5-simple-techniques-for-baga4se7-crystal