Nonlocal supercurrent in mesoscopic Josephson junctions

J.P. Heida, B.J. van Wees, T.M. Klapwijk, G. Borghs

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Abstract

We demonstrate that in a mesoscopic, fully phase coherent, superconductor–two-dimensional-electron-gas–superconductor structure the period of the critical current versus flux through the junction is h/e, i.e., twice the superconducting flux quantum. Using a heuristic approach we argue that the observations point to a nonlocal supercurrent density. The particles carrying the supercurrent sense the superconductor phase, which is spatially modulated by the magnetic field, along the entire electrode.
Original languageEnglish
Pages (from-to)R5618 - R5621
Number of pages4
JournalPhysical Review B
Volume57
Issue number10
DOIs
Publication statusPublished - 1998

Keywords

  • QUANTUM-WELL STRUCTURES
  • POINT-CONTACT
  • INTERFERENCE
  • TRANSPORT
  • CURRENTS
  • ENERGY
  • FIELD

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