  Based on the recently found non-trivial topology of buckled antimonene, we
propose the conceptual design of a quantized switch that is protected by
topology and a mechanism to create configurable 1D wire channels.
  We show that the topologically required edge states in this system can be
turned on and off by breaking the inversion symmetry (reducing the symmetry
from $S_6$ to $C_3$), which can be achieved by gating the system. This is shown
to create a field-effect quantum switch projected by topology.
  Secondly we show that by locally gating the system with different polarity in
different areas, a soliton-like domain wall is created at their interface,
which hosts a protected electronic state, in which transport could be accessed
by gated doping.
