′�?, which has a frequency of 295 cm−one, is attributed into the stretching vibration of Ga–Se bonds. The 2-phonon absorption with the 295 cm−1 phonon corresponds towards the crystal IR absorption edge, as opposed to the residual absorption peak. Density functional idea computations clearly show the residual absorption in the https://baga4se7crystal42840.blogacep.com/37664068/the-ultimate-guide-to-baga4se7-crystal