′�?, which has a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption in the 295 cm−1 phonon corresponds into the crystal IR absorption edge, rather than the residual absorption peak. Density purposeful principle computations demonstrate that the residual absorption of the BGSe https://baga4se7crystal47800.blazingblog.com/32871046/the-smart-trick-of-baga4se7-crystal-that-nobody-is-discussing