Evidence for Supercurrent Quantization in Interfacial Josephson Junctions

Details Evidence for Supercurrent Quantization in Interfacial Josephson Junctions Evidence for Supercurrent Quantization in Interfacial Josephson Junctions

1997-07-07

arxiv.org/abs/cond-mat/9707071v2

Physics

Condensed Matter

Superconductivity

Submitted to PRL 8 pages, 4 figures. Text file is paper.tex and Figs. 1 - 4 are GIF files

Scientific paper

10.1103/PhysRevLett.80.596

We observe a series of discontinuities in the above gap current/voltage characteristics of highly transmissive Nb/Si superconductor/semiconductor interfaces. The bias at which each switch occurs decreases in quantized steps as a function of temperature and magnetic field. The observed step-size is the same for both dependencies. We propose that the steps correspond to supercurrent quantization through granular Josephson junctions formed near the interface.

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