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Graphene-based superlattices offer a new materials playground to exploit andcontrol a higher number of electronic degrees of freedom, such as charge, spin,or valley for disruptive technologies. Recently, orbital effects, emerging inmultivalley band structure lacking inversion symmetry, have been discussed aspossible mechanisms for developing orbitronics. Here, we report non-localtransport measurements in small gap hBN/graphene/hBN moir\'e superlatticeswhich reveal very strong magnetic field-induced chiral response which is stableup to room temperature. The measured sign dependence of the non-local signalwith respect to the magnetic field orientation clearly indicates themanifestation of emerging orbital magnetic moments. The interpretation ofexperimental data is well supported by numerical simulations, and the reportedphenomenon stands as a formidable way of in-situ manipulation of the transverseflow of orbital information, that could enable the design of orbitronicdevices.

Generation and control of non-local chiral currents in graphene superlattices by orbital Hall effect