′�?, that has a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−one phonon corresponds into the crystal IR absorption edge, rather then the residual absorption peak. Density useful concept computations demonstrate that the residual absorption from the BGSe https://simonfgdxt.digiblogbox.com/57653602/the-ultimate-guide-to-baga4se7-crystal