Generalizing asymmetric and pseudo-Voigt functions by means of q-Gaussian Tsallis functions to analyze the wings of Raman spectral bands

It is important, for further applying the q-Gaussian Tsallis functions, to discuss how they can generalize asymmetric and pseudo-Voigtian functions. Some remarks about Voigt functions are also stressed, regarding the behavior of the wings of Raman spectral components. The use of Voigt and pseudo-Voigt functions implies the wings as Lorentzian, but this is not observed for the Raman bands. At the same time, the wings are not Gaussians, and for this reason q-Gaussians are fundamental for evidencing the wing behavior.