′�?, which has a frequency of 295 cm−1, is attributed to the stretching vibration of Ga–Se bonds. The 2-phonon absorption with the 295 cm−1 phonon corresponds for the crystal IR absorption edge, as an alternative to the residual absorption peak. Density purposeful principle computations demonstrate the residual absorption from the https://dantebjlll.idblogmaker.com/31985291/everything-about-baga4se7-crystal