′�?, that has a frequency of 295 cm−one, is attributed to the stretching vibration of Ga–Se bonds. The 2-phonon absorption of your 295 cm−one phonon corresponds on the crystal IR absorption edge, rather then the residual absorption peak. Density functional idea computations exhibit that the residual absorption on the BGSe https://emilianocggfc.designertoblog.com/64046520/not-known-facts-about-baga4se7-crystal