Direct nanoscale imaging shows quantum Hall edge states in graphene carry paired counterpropagating currents, while the pure magnetic monopole response survives only at singular points of a mixed magnetoelectric phase diagram.
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Nanoscale imaging of equilibrium quantum Hall edge currents and of the magnetic monopole response in graphene
Direct nanoscale imaging shows quantum Hall edge states in graphene carry paired counterpropagating currents, while the pure magnetic monopole response survives only at singular points of a mixed magnetoelectric phase diagram.