The impact of domain walls on quantum transport in bilayer graphene

Bilayer graphene exhibits a rich variety of broken symmetry states due to its various internal degrees of freedom. Most important for their emergence is the cleanliness of the graphene, however, also the existence or absence of structural and electronic domain walls in bilayer graphene can heavily affect the quantum transport. Here, we present an extensive study on several dual-gated freestanding bilayer graphene devices, giving evidence that domains within a device change its transport properties significantly. Besides suppressing the spontaneous phase, domain walls have also a big impact on the electric field dependence of quantum Hall states.