′�?, which has a frequency of 295 cm−1, is attributed to your stretching vibration of Ga–Se bonds. The 2-phonon absorption in the 295 cm−1 phonon corresponds towards the crystal IR absorption edge, instead of the residual absorption peak. Density functional idea computations clearly show that the residual absorption on the https://baga4se7crystal20767.shotblogs.com/baga4se7-crystal-options-46724088