′�?, having a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption of the 295 cm−one phonon corresponds for the crystal IR absorption edge, instead of the residual absorption peak. Density purposeful principle computations display the residual absorption from the BGSe crystal originates https://baga4se7-crystal52851.targetblogs.com/33271916/the-best-side-of-baga4se7-crystal