Tuning the proximity effect in a superconductor-graphene-superconductor junction

2009/03/17 by Claudia Ojeda‐Aristizabal, C. M. Ojeda-Aristizabal, M. Ferrier +3 · 117 citations
Materials Science · Physics and Astronomy · #Annealing (glass) #Composite material #Computer science #Condensed matter physics #Electrode #Graphene #Graphene research and applications #Josephson effect #Layer (electronics) #Materials science #Nanotechnology #Physics #Proximity effect (electron beam lithography) #Quantum and electron transport phenomena #Quantum mechanics #Superconductivity #Telecommunications #Topological Materials and Phenomena #Transmission (telecommunications) #Transmission coefficient #cond-mat.mes-hall #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.79.165436

published in Physical Review B 79(16) (American Physical Society) · Accepted for publication in Phys. Rev. B

arxiv created 2009/03/17 · openalex publication_date 2009/04/28 · arxiv updated 2015/05/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We have tuned in situ the proximity effect in a single graphene layer coupled to two Pt/Ta superconducting electrodes. An annealing current through the device changed the transmission coefficient of the electrode/graphene interface, increasing the probability of multiple Andreev reflections. Repeated annealing steps improved the contact sufficiently for a Josephson current to be induced in graphene.

Citations

• Ultrahigh electron mobility in suspended graphene
• Specular Andreev Reflection in Graphene
• Electric Field Effect in Atomically Thin Carbon Films
• Random-matrix theory of quantum transport
• Density of states and supercurrent in diffusive SNS junctions: Roles of nonideal interfaces and spin-flip scattering
• Excitation gap of a graphene channel with superconducting boundaries
• Experimental observation of the quantum Hall effect and Berry's phase in graphene

Cited by

• Anisotropic supercurrent suppression and revivals in a graphene-based Josephson junction under in-plane magnetic fields

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• Competition between the Superconducting Proximity Effect and Coulomb\n Interactions in a Graphene Andreev Interferometer
• Building 3D superconductor-based Josephson junctions using a via transfer approach