Suppression of Josephson currents in ballistic junctions by an injection current

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Golubov, A.A. and Neurohr, K. and Schäpers, Th. and Lüth, H. and Behet, M. (1999) Suppression of Josephson currents in ballistic junctions by an injection current. Superlattices and Microstructures, 25 (5-6). pp. 1033-1040. ISSN 0749-6036

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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.
Item Type:Article
Copyright:© 1999 Elsevier
Faculty:
Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/74190
Official URL:http://dx.doi.org/10.1006/spmi.1999.0715
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Metis ID: 128794