′�?, by using a frequency of 295 cm−one, is attributed into the stretching vibration of Ga–Se bonds. The 2-phonon absorption with the 295 cm−1 phonon corresponds into the crystal IR absorption edge, rather then the residual absorption peak. Density useful theory computations clearly show the residual absorption of your BGSe https://kylerucobm.blogkoo.com/the-smart-trick-of-baga4se7-crystal-that-nobody-is-discussing-52228768