′�?, having a frequency of 295 cm−1, is attributed into the stretching vibration of Ga–Se bonds. The two-phonon absorption from the 295 cm−1 phonon corresponds to the crystal IR absorption edge, in lieu of the residual absorption peak. Density purposeful idea computations display that the residual absorption from the BGSe https://baga4se7crystal64685.theblogfairy.com/31906685/the-ultimate-guide-to-baga4se7-crystal