′�?, by using a frequency of 295 cm−one, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption from the 295 cm−one phonon corresponds for the crystal IR absorption edge, as opposed to the residual absorption peak. Density functional idea computations demonstrate the residual absorption from the BGSe https://baga4se7crystal29639.newsbloger.com/33062850/the-smart-trick-of-baga4se7-crystal-that-no-one-is-discussing