Phase diffusion in graphene-based Josephson junctions.
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2011-09-21
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We report on graphene-based Josephson junctions with contacts made from lead. The high transition temperature of this superconductor allows us to observe the supercurrent branch at temperatures up to ∼2 K, at which point we can detect a small, but nonzero, resistance. We attribute this resistance to the phase diffusion mechanism, which has not been yet identified in graphene. By measuring the resistance as a function of temperature and gate voltage, we can further characterize the nature of the electromagnetic environment and dissipation in our samples.
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Borzenets, IV, UC Coskun, SJ Jones and G Finkelstein (2011). Phase diffusion in graphene-based Josephson junctions. Physical review letters, 107(13). p. 137005. 10.1103/physrevlett.107.137005 Retrieved from https://hdl.handle.net/10161/19629.
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Gleb Finkelstein
Gleb Finkelstein is an experimentalist interested in physics of quantum nanostructures, such as Josephson junctions and quantum dots made of carbon nanotubes, graphene, and topological materials. These objects reveal a variety of interesting electronic properties that may form a basis for future quantum devices.
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