′�?, that has a frequency of 295 cm−one, is attributed for the stretching vibration of Ga–Se bonds. The 2-phonon absorption in the 295 cm−one phonon corresponds to your crystal IR absorption edge, rather then the residual absorption peak. Density functional concept computations show which the residual absorption on the BGSe https://baga4se7crystal07395.popup-blog.com/31861372/helping-the-others-realize-the-advantages-of-baga4se7-crystal