′�?, using a frequency of 295 cm−one, is attributed for the stretching vibration of Ga–Se bonds. The two-phonon absorption of the 295 cm−one phonon corresponds on the crystal IR absorption edge, in lieu of the residual absorption peak. Density purposeful concept computations clearly show that the residual absorption of the https://baga4se7-crystal30639.blog-mall.com/33401504/about-baga4se7-crystal