Josephson type current-voltage characteristics of chemically modified graphite at room temperature and normal pressure

This work shows that Josephson type current-voltage characteristics are observed up to room temperature at normal pressure for hybrid particles based on polystyrene and multilayer reduced graphene oxide. The deformation of sheets of multilayer reduced graphene oxide during its functionalization with methacrylate groups, copolymerization with styrene and exposure to a toluene solution in the cross-linked structure leads to the appearance of superconductivity in the resulting hybrid flakes. Moreover, with an increase in the magnetic field or temperature above the critical one, the Josephson type of current-voltage characteristics for them reversibly changes to ohmic.