′�?, with a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption on the 295 cm−1 phonon corresponds to the crystal IR absorption edge, rather than the residual absorption peak. Density purposeful concept computations show the residual absorption from the BGSe crystal originates https://walts888jwj3.nytechwiki.com/user