′�?, using a frequency of 295 cm−one, is attributed for the stretching vibration of Ga–Se bonds. The two-phonon absorption of the 295 cm−1 phonon corresponds into the crystal IR absorption edge, rather then the residual absorption peak. Density practical idea computations exhibit which the residual absorption on the BGSe crystal https://baga4se7crystal08406.blogdemls.com/32513847/details-fiction-and-baga4se7-crystal