Tuning the Influence of Microscopic Decoherence on the Superconducting Proximity Effect in a Graphene Andreev Interferometer

Article Article scientifique Article Tuning the Influence of Microscopic Decoherence on the Superconducting Proximity Effect in a Graphene Andreev Interferometer eng 2014 author Deon Fabio 762995 author Sopic Sandra 720394 author Morpurgo Alberto 666794 126803 10.1103/PhysRevLett.112.126803 0031-9007 We discuss transport measurements through graphene Andreev interferometers exhibiting reentrance of the superconducting proximity effect. We observe that at high gate voltage (VBG) the energy dependence of the Andreev conductance oscillations exhibits a scaling in agreement with theoretical expectations, which breaks down at low VBG, when the Fermi energy approaches the charge neutrality point. The phenomenon is a manifestation of single particle dephasing that increasingly limits the propagation of superconducting correlations away from the superconductor-graphene interface. Our work addresses the interplay between microscopic decoherence and superconductivity, and shows that graphene provides a useful experimental platform to investigate unexplored regimes and phenomena in the superconducting proximity effect. Dewey 500.2 33 Département de physique de la matière quantique 131 false 678 Groupe Morpurgo Physical review letters 112 12 ba25856d-f546-4ae3-abf7-06a9988ad968 Article (Published version) Public Morpurgo3_PhysRevLett.112.pdf 2278962 application/pdf openAccess Faculté des sciences / Section de physique / Département de physique de la matière quantique

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Tuning the Influence of Microscopic Decoherence on the Superconducting Proximity Effect in a Graphene Andreev Interferometer	Physical review letters			2014	766	414

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Deon, Fabio