  It is shown that a charge-neutral spin-1 exciton, realizable only in planar
systems like graphene, can effectively be used for controlled spin transport in
such media. The excitonic bound state is destabilized by quantum fluctuations,
characterized by a threshold for excitation and melts in a smooth manner under
thermal fluctuations. This planar exciton differs from the conventional ones,
as it owes its existence to the topological Chern-Simons (CS) term. The parity
and time-reversal violating CS term can arise from quantum effects in systems
with parity-breaking mass-gap. The spinning exciton naturally couples to
magnetic field, leading to the possibility of controlled spin transport. Being
neutral, it is immune to adverse effects, afflicting spin transport by charged
fermions.
