Suppression of Josephson currents in ballistic junctions by an injection current

Alexandre Avraamovitch Golubov, K. Neurohr, Th. Schäpers, H. Lüth, M. Behet

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Abstract

Control of the critical current in a superconductor/two-dimensional electron gas Josephson junction by means of an injection current is reported. The control mechanism is explained by a theoretical model, which takes ballistic transport across the junction and diffusive transport through the semiconductor wire structure into account. Measurements on a Nb-AlGaSb/InAs-Nb junction show that the strong suppression of the critical current can, in principle, be explained by the theoretical model. Deviations are due to the nonlinear current–voltage characteristics of the superconductor/two-dimensional electron gas interface and the two-dimensionality of the supercurrent transport.
Original languageUndefined
Pages (from-to)1033-1040
Number of pages8
JournalSuperlattices and microstructures
Volume25
Issue number25
DOIs
Publication statusPublished - 1999

Keywords

  • Josephson junction
  • Non-equilibrium supercurrent
  • METIS-128794
  • IR-74190
  • Proximity effect

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