Tunable Superconducting Phase Transition in Metal-Decorated Graphene Sheets - Condensed Matter > Mesoscale and Nanoscale PhysicsReport as inadecuate




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Abstract: Using typical experimental techniques it is difficult to separate the effectsof carrier density and disorder on the superconducting transition in twodimensions. Using a simple fabrication procedure based on metal layerdewetting, we have produced graphene sheets decorated with a non-percolatingnetwork of nanoscale tin clusters. These metal clusters both efficiently dopethe graphene substrate and induce long-range superconducting correlations. Thisallows us to study the superconducting transition at fixed disorder andvariable carrier concentration. We find that despite structural inhomogeneityon mesoscopic length scales 10-100 nm, this material behaves electronicallyas a homogenous dirty superconductor. Our simple self-assembly methodestablishes graphene as an ideal tunable substrate for studying inducedtwo-dimensional electronic systems at fixed disorder and our technique canreadily be extended to other order parameters such as magnetism.



Author: B.M. Kessler, C.O. Girit, A. Zettl, V. Bouchiat

Source: https://arxiv.org/







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