′�?, that has a frequency of 295 cm−one, is attributed into the stretching vibration of Ga–Se bonds. The 2-phonon absorption of the 295 cm−one phonon corresponds into the crystal IR absorption edge, rather than the residual absorption peak. Density purposeful principle computations clearly show which the residual absorption on the https://baga4se7crystal41627.azzablog.com/32795384/baga4se7-crystal-an-overview