′�?, using a frequency of 295 cm−1, is attributed into the stretching vibration of Ga–Se bonds. The 2-phonon absorption of the 295 cm−one phonon corresponds to your crystal IR absorption edge, rather then the residual absorption peak. Density purposeful principle computations show the residual absorption with the BGSe crystal originates https://baga4s7-crystal62739.alltdesign.com/5-tips-about-baga4se7-crystal-you-can-use-today-52092717