′�?, using a frequency of 295 cm−1, is attributed towards the stretching vibration of Ga–Se bonds. The 2-phonon absorption with the 295 cm−one phonon corresponds to your crystal IR absorption edge, in lieu of the residual absorption peak. Density practical idea computations show which the residual absorption from the BGSe https://sergiotzaby.blogs100.com/33132666/5-tips-about-baga4se7-crystal-you-can-use-today