  The possibility for carbon materials such as activated carbon fibers or
graphite ribbons, to support edge-states could change drastically their
magnetic properties. The purpose of this work is to propose a novel way to
identify the existence of those states by considering the behaviour of the
static electric polarizability under a perpendicular magnetic field. The
edge-sates are shown to induce a quadratic dependence on magnetic field
detectable experimentally nowaday.
