′�?, having a frequency of 295 cm−1, is attributed towards the stretching vibration of Ga–Se bonds. The 2-phonon absorption with the 295 cm−1 phonon corresponds into the crystal IR absorption edge, rather then the residual absorption peak. Density purposeful principle computations display which the residual absorption on the BGSe crystal https://juliusshtfq.blogolize.com/5-easy-facts-about-baga4se7-crystal-described-71846632