Evidence for Supercurrent Quantization in Interfacial Josephson Junctions
M. J. Black, B. W. Alphenaar, H. Ahmed
DOI 10.1103/PhysRevLett.80.596 · Physical Review Letters
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Abstract
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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9 | Pressure not reported | unknown |
| Nb3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.5 | Pressure not reported | onset |
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