As we have previously seen, three q-Gaussians components are able, as in the Fig. , to fit the asymmetric LO mode of SiC (the fit is further improved if four components are used). In the framework of a RWL model, we can assume to use an asymmetric q-Gaussian accompanied by a symmetric q-Gaussian as in the Fig. . According to the discussion previously given, both approaches can be adopted for fitting asymmetric peaks.