Observation of Maximum Supercurrent Quantization in a Superconducting Quantum Point Contact
Hideaki Takayanagi, Tatsushi Akazaki, Junsaku Nitta
DOI 10.1103/PhysRevLett.75.3533 · Physical Review Letters
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Abstract
We have confirmed the quantization of the critical current in a superconducting quantum point contact consisting of a split-gate superconductor-(two-dimensional electron gas)-superconductor junction. The critical current and conductance show stepwise changes as a function of the gate voltage. We also observed resonant structure resulting from quantum interference of quasiparticles at the step edge.
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. | 9.2 | Pressure not reported | unknown |
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