′�?, which has a frequency of 295 cm−one, is attributed on the stretching vibration of Ga–Se bonds. The 2-phonon absorption with the 295 cm−one phonon corresponds on the crystal IR absorption edge, as opposed to the residual absorption peak. Density functional concept computations clearly show that the residual absorption with https://simonflnnl.bloggerswise.com/39805827/what-does-baga4se7-crystal-mean