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An established way of realizing topologically protected states in atwo-dimensional electron gas is by applying a perpendicular magnetic field thuscreating quantum Hall edge channels. In electrostatically gapped bilayergraphene intriguingly, even in the absence of a magnetic field topologicallyprotected electronic states can emerge at naturally occurring stacking domainwalls. While individually both types of topologically protected states havebeen investigated, their intriguing interplay remains poorly understood. Here,we focus on the interplay between topological domain wall states and quantumHall edge transport within the eight-fold degenerate zeroth Landau level ofhigh-quality suspended bilayer graphene. We find that the two-terminalconductance remains approximately constant for low magnetic fields throughoutthe distinct quantum Hall states since the conduction channels are tradedbetween domain wall and device edges. For high magnetic fields, however, weobserve evidence of transport suppression at the domain wall, which can beattributed to the emergence of spectral minigaps. This indicates that stackingdomain walls do potentially do not correspond to a topological domain wall inthe order parameter.

Interplay between topological protected valley and quantum Hall edge transport