′�?, which has a frequency of 295 cm−1, is attributed to your stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−one phonon corresponds for the crystal IR absorption edge, instead of the residual absorption peak. Density purposeful principle computations display which the residual absorption from the BGSe https://baga4se7crystal16159.wizzardsblog.com/32734336/new-step-by-step-map-for-baga4se7-crystal