′�?, with a frequency of 295 cm−1, is attributed to your stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−1 phonon corresponds towards the crystal IR absorption edge, as opposed to the residual absorption peak. Density useful idea computations exhibit that the residual absorption of your BGSe https://edwinfuitf.topbloghub.com/39069356/considerations-to-know-about-baga4se7-crystal