Chiral Andreev edge states in graphene samples with nanostructured superconducting contacts and graphite gates

The pursuit of exotic excitations in topological materials has drawn growing attention to hybrid systems combining quantum Hall (QH) edge states with superconductors (SC). These systems can host chiral Andreev edge states (CAES), yet the many details about the microscopic mechanism governing Andreev conversion at the QH/SC interfaces require further understanding. By employing nanoscale patterning of graphite gates and superconducting contacts to control interactions and tunneling between QH edge states and superconducting regions, we pursue a deeper understanding of the CAES properties with an emphasis on their spin properties and confinement. The resulting transport signatures shed light on the fundamental nature of CAES and deepen our understanding of superconductivity in chiral edge systems.