′�?, using a frequency of 295 cm−1, is attributed into the stretching vibration of Ga–Se bonds. The 2-phonon absorption in the 295 cm−one phonon corresponds to your crystal IR absorption edge, rather than the residual absorption peak. Density useful idea computations display that the residual absorption in the BGSe crystal https://baga4se7crystal24679.ageeksblog.com/31732602/baga4se7-crystal-an-overview