′�?, that has a frequency of 295 cm−1, is attributed for the stretching vibration of Ga–Se bonds. The two-phonon absorption of the 295 cm−one phonon corresponds to the crystal IR absorption edge, in lieu of the residual absorption peak. Density practical theory computations demonstrate the residual absorption of the BGSe https://baga4se7crystal05050.myparisblog.com/33259490/the-smart-trick-of-baga4se7-crystal-that-nobody-is-discussing