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In the quantum Hall regime, chiral electron and hole edge states can hybridize along a superconducting interface, as a result of the Andreev reflection process. This yields exciting electronic phenomena which are within experimental reach given recent progress in the fabrication of superconducting graphene heterostructures. Indeed, a robust quantum Hall effect can be induced at low field in these devices, well below the upper critical field of the superconductor. The two phases can therefore coexist.

In this talk, I will discuss how the control of the electrostatic potential near the edges of the device allows the experimental realization of a superconducting interferometer relying on quantum Hall edge states. I will also discuss experimental signatures of chiral Andreev edge states at the interface of the superconductor.