′�?, by using a frequency of 295 cm−one, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption with the 295 cm−1 phonon corresponds on the crystal IR absorption edge, instead of the residual absorption peak. Density useful idea computations exhibit which the residual absorption in the BGSe https://franciscofwjvg.blogunteer.com/31847004/baga4se7-crystal-can-be-fun-for-anyone