′�?, that has a frequency of 295 cm−1, is attributed to the stretching vibration of Ga–Se bonds. The two-phonon absorption in the 295 cm−one phonon corresponds to the crystal IR absorption edge, rather than the residual absorption peak. Density purposeful theory computations display that the residual absorption from the BGSe https://baga4se7-crystal51616.bloginwi.com/66524195/5-simple-techniques-for-baga4se7-crystal