Abstract
Recent experiments have shown that proximity with high-temperature superconductors induces unconventional superconducting correlations in graphene. Here, we demonstrate that those correlations propagate hundreds of nanometers, allowing for the unique observation of d-wave Andreev-pair interferences in YBa_{2}Cu_{3}O_{7}-graphene devices that behave as a Fabry-Perot cavity. The interferences show as a series of pronounced conductance oscillations analogous to those originally predicted by de Gennes-Saint-James for conventional metal-superconductor junctions. The present demonstration is pivotal to the study of exotic directional effects expected for nodal superconductivity in Dirac materials.
Highlights
Recent experiments have shown that proximity with high-temperature superconductors induces unconventional superconducting correlations in graphene
The interferences show as a series of pronounced conductance oscillations analogous to those originally predicted by de Gennes–Saint-James for conventional metal-superconductor junctions
Studies on graphene have paved the way for understanding the proximity effect in other Dirac materials, such as topological insulators [8,9,10,11]
Summary
Recent experiments have shown that proximity with high-temperature superconductors induces unconventional superconducting correlations in graphene. Long-Range Propagation and Interference of d-Wave Superconducting Pairs in Graphene We demonstrate that those correlations propagate hundreds of nanometers, allowing for the unique observation of d-wave Andreev-pair interferences in YBa2Cu3O7-graphene devices that behave as a Fabry-Perot cavity.
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