  The influence of a rectangular potential barrier on the quantum transport of
fermions in silicene is explored. Specifically, analytical solutions are
presented to derive transmission and reflection probabilities together with
conductance. It is shown that the transmission is highly sensitive to both the
barrier height and incident energy. As a result, the occurrence of Klein and
resonant tunnelings is observed, with a significant dependence on the barrier
width. Notably, it is found that perfect transmission extends beyond normal
incidence, occurring at various oblique angles. Moreover, the transmission
pattern exhibits a more fragmented structure with increasing barrier width,
reminiscent of Fabry-P\'erot resonances. In contrast, the conductance displays
a non-monotonic dependence on incident energy and features rapid oscillations
with a rising barrier height. However, at a constant barrier height, there is a
minimal disparity among conductance profiles for high incident energy values.
When incident energy equals the barrier height, the conductance experiences a
local minimum. For a thin barrier, a substantial reduction in conductance is
observed, unlike the oscillatory behavior seen with a thicker barrier. These
findings underscore the progress in silicene research and offer a fresh
perspective on the relativistic applications of tunneling in this material.
