Long-Range Propagation and Interference of $d$-wave Superconducting Pairs in Graphene

• URL: http://arxiv.org/abs/2002.10173v2
• Date: Tue, 8 Sep 2020 09:18:11 GMT
• Title: Long-Range Propagation and Interference of $d$-wave Superconducting Pairs in Graphene
• Authors: D. Perconte, K. Seurre, V. Humbert, C. Ulysse, A. Sander, J. Trastoy, V. Zatko, F. Godel, P. R. Kidambi, S. Hofmann, X. P. Zhang, D. Bercioux, F. S. Bergeret, B. Dlubak, P. Seneor and Javier E. Villegas
• Abstract summary: 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 nanometer, allowing for the unique observation of $d$-wave Andreev pair interferences in YBa$$Cu$_3$O$_7$-graphene devices.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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 nanometer, 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-P\'erot 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 work is pivotal to the study of exotic directional effects expected for nodal superconductivity in Dirac materials.

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