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Snake states are trajectories of charge carriers curving back and forth along an interface. There are two types of snake states, formed by either inverting the magnetic field direction or the charge carrier type at an interface. The former has been demonstrated in GaAs-AlGaAs heterostructures, whereas the latter has become conceivable only with the advance(More)
The nanoribbons were fabricated by depositing a graphene flake over a bottom gate structure, then etching longitudinal edges and a hole in the center of the flake using re-active ion etching, before suspension. Fig. S1 shows an SEM image of a final double-ribbon structure. Two bottom gates-situated below the suspended branches and contacts are schematically(More)
The formation of quantum Hall channels inside the bulk of graphene is studied using various contact and gate geometries. p-n junctions are created along the longitudinal direction of samples, and enhanced conductance is observed in the case of bipolar doping due to the new conducting channels formed in the bulk, whose position, propagating direction and, in(More)
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