′�?, by using a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption in the 295 cm−one phonon corresponds on the crystal IR absorption edge, as opposed to the residual absorption peak. Density useful theory computations present that the residual absorption with the https://reidk544v.like-blogs.com/32471017/not-known-details-about-baga4se7-crystal