′�?, by using a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The 2-phonon absorption of the 295 cm−one phonon corresponds on the crystal IR absorption edge, as an alternative to the residual absorption peak. Density functional idea computations present that the residual absorption on https://kamerontwwwt.blogsvila.com/32852512/helping-the-others-realize-the-advantages-of-baga4se7-crystal