Current-Phase Measurements in Single Layer Graphene
ORAL
Abstract
The current-phase relationship (CPR) of a Josephson junction can provide key information about the microscopic processes that make up a supercurrent. However, CPR has not been previously measured in graphene. We have successfully fabricated a variety of Josephson junctions containing single-layer graphene as a weak link, and with different junction width to length ratios. We present results of measurements based on a phase-sensitive SQUID technique, where we determine the supercurrent amplitude and phase, as well as a possibly anomalous shape of the CPR.
*Work supported by the DOE under DE-FG02-07ER46453 through the Frederick Seitz Materials Research Laboratory and the NSF under DMR-0605813.
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Authors
Cesar Chialvo
Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign
University of Illinois at Urbana-Champaign
Ion Moraru
Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign
Daniel Bahr
Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign
Nadya Mason
Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign
Department of Physics and Materials Research Laboratory, University of Illinois
University of Illinois at Urbana-Champaign
Dale Van Harlingen
Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign
