′�?, using a frequency of 295 cm−one, is attributed to the stretching vibration of Ga–Se bonds. The 2-phonon absorption of your 295 cm−1 phonon corresponds to the crystal IR absorption edge, instead of the residual absorption peak. Density practical principle computations present that the residual absorption of the BGSe crystal https://baga4s7-crystal19730.nizarblog.com/32920731/the-best-side-of-baga4se7-crystal