′�?, 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−1 phonon corresponds for the crystal IR absorption edge, instead of the residual absorption peak. Density functional idea computations clearly show that the residual absorption of your https://baga4se7crystal94049.blogozz.com/31883654/detailed-notes-on-baga4se7-crystal