A SECRET WEAPON FOR BAGA4SE7 CRYSTAL

′�?, by using a frequency of 295 cm−1, is attributed to the stretching vibration of Ga–Se bonds. The two-phonon absorption of the 295 cm−1 phonon corresponds to the crystal IR absorption edge, in lieu of the residual absorption peak. Density purposeful theory computations exhibit that the residual absorption of the BGSe crystal originates