  Silicene is becoming one of the most important two-dimensional materials. In
this work, EEL Spectra were calculated for alfa-silicene (flat), and
beta-silicene (low-buckled, and theoretically the most stable). Band structures
were determined using the semi-empirical Tight-Binding Method considering
second nearest neighbors, sp3 model, Harrison's rule, and Slater-Koster
parameterization. The dielectric function was calculated within the Random
Phase Approximation and a space discretization scheme. We found that, compared
to bulk Si, additional resonances appear which are red-shifted. Buckling gives
rise to a richer structure at low energy.
