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arXiv · 1706.09150

Conduction Channels of an InAs-Al nanowire Josephson weak link

M. F. Goffman·C. Urbina·H. Pothier·J. Nygård·C. M. Marcus·P. Krogstrup
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Abstract

We present a quantitative characterization of an electrically tunable Josephson junction defined in an InAs nanowire proximitized by an epitax-ially-grown superconducting Al shell. The gate-dependence of the number of conduction channels and of the set of transmission coefficients are extracted from the highly nonlinear current-voltage characteristics. Although the transmissions evolve non-monotonically, the number of independent channels can be tuned, and configurations with a single quasi-ballistic channel achieved.

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M. F. Goffman, C. Urbina, H. Pothier, J. Nygård, C. M. Marcus, P. Krogstrup. 2017-06-28. Conduction Channels of an InAs-Al nanowire Josephson weak link. https://doi.org/10.1088/1367-2630/aa7641

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