  We propose an experimental scheme to realize adiabatic topological spin and
valley pumping by using silicene subject to an in-plane $ac$ electric field
with amplitude $E_{y}$ and a vertical electric field consisting of an
electrostatic component and an $ac$ component with amplitudes $E_{z}^{0}$ and
$E_{z}^{1}$. By tuning $E_{z}^{0}$ and $E_{z}^{1}$, topological valley pumping
or spin-valley pumping can be achieved. The noisefree valley and spin currents
generated could be useful in valleytronic and spintronic applications. This
work demonstrates that bulk topological spin or valley pumping is a general
characteristic effect of two-dimensional topological insulators, irrelevant to
the edge state physics.
