  A novel promising route for creating topological states and excitations is to
combine superconductivity and the quantum Hall (QH) effect. Despite this
potential, signatures of superconductivity in the quantum Hall regime remain
scarce, and a superconducting current through a QH weak link has so far eluded
experimental observation. Here we demonstrate the existence of a new type of
supercurrent-carrying states in a QH region at magnetic fields as high as
2Tesla. The observation of supercurrent in the quantum Hall regime marks an
important step in the quest for exotic topological excitations such as Majorana
fermions and parafermions, which may find applications in fault-tolerant
quantum computations.
