′�?, using a frequency of 295 cm−1, is attributed for the stretching vibration of Ga–Se bonds. The two-phonon absorption in the 295 cm−one phonon corresponds to your crystal IR absorption edge, as an alternative to the residual absorption peak. Density practical concept computations demonstrate the residual absorption of your BGSe https://baf-crystal49271.tblogz.com/how-much-you-need-to-expect-you-ll-pay-for-a-good-baga4se7-crystal-46459873