′�?, with a frequency of 295 cm−one, is attributed to the stretching vibration of Ga–Se bonds. The two-phonon absorption with the 295 cm−one phonon corresponds into the crystal IR absorption edge, in lieu of the residual absorption peak. Density practical idea computations present the residual absorption from the BGSe crystal https://jaidenzgikl.ssnblog.com/31673726/the-smart-trick-of-baga4se7-crystal-that-no-one-is-discussing