′�?, by using a frequency of 295 cm−one, is attributed to the stretching vibration of Ga–Se bonds. The two-phonon absorption of your 295 cm−one phonon corresponds towards the crystal IR absorption edge, instead of the residual absorption peak. Density purposeful principle computations exhibit that the residual absorption of the BGSe https://zanebgmkm.smblogsites.com/32771277/the-ultimate-guide-to-baga4se7-crystal