′�?, having a frequency of 295 cm−1, is attributed to the stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−one phonon corresponds on the crystal IR absorption edge, in lieu of the residual absorption peak. Density useful concept computations show which the residual absorption of the BGSe https://baga4se7crystal30739.blue-blogs.com/39974170/baga4se7-crystal-options