Abstract
We report a study of electronic transport in van der Waals heterostructures composed of flakes of the antiferromagnetic Mott insulator placed on top of monolayer graphene Hall bars. While the zero-field transport shows a strong resemblance to that of isolated graphene, we find a consistently -type Hall effect suggestive of multiband conduction, along with a nonmonotonic and gate-voltage-dependent excursion of the resistivity at low temperatures that is reminiscent of transport in the presence of a magnetic phase transition. We interpret these data as evidence for charge transfer from graphene to in an inhomogeneous device yielding both highly and lightly doped regions of graphene, while the latter shows a particular sensitivity to magnetism in the . Thus proximity to graphene is a means to access magnetic properties of thin layers of magnetic insulators.
- Received 24 July 2019
DOI:https://doi.org/10.1103/PhysRevB.100.165426
©2019 American Physical Society