′�?, that has a frequency of 295 cm−1, is attributed for the stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−1 phonon corresponds into the crystal IR absorption edge, rather than the residual absorption peak. Density purposeful principle computations present that the residual absorption from the BGSe https://landenbgdwo.weblogco.com/32892605/top-latest-five-baga4se7-crystal-urban-news