′�?, which has a frequency of 295 cm−one, is attributed into the stretching vibration of Ga–Se bonds. The 2-phonon absorption in the 295 cm−1 phonon corresponds to the crystal IR absorption edge, rather than the residual absorption peak. Density purposeful concept computations present which the residual absorption on the BGSe https://chancexcfge.liberty-blog.com/32893075/rumored-buzz-on-baga4se7-crystal