′�?, that has a frequency of 295 cm−1, is attributed for the stretching vibration of Ga–Se bonds. The two-phonon absorption from the 295 cm−one phonon corresponds to your crystal IR absorption edge, rather then the residual absorption peak. Density practical principle computations demonstrate which the residual absorption in the BGSe https://cesaraghii.ivasdesign.com/54172263/5-tips-about-baga4se7-crystal-you-can-use-today