′�?, which has a frequency of 295 cm−one, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption on the 295 cm−1 phonon corresponds to your crystal IR absorption edge, rather then the residual absorption peak. Density practical principle computations demonstrate that the residual absorption on the BGSe https://baga4se7crystal96396.collectblogs.com/77803949/top-latest-five-baga4se7-crystal-urban-news