Doubled Full Shot Noise in Quantum Coherent Superconductor-Semiconductor Junctions
F. Lefloch, C. Hoffmann, M. Sanquer, D. Quirion
DOI 10.1103/PhysRevLett.90.067002 · Physical Review Letters
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Abstract
We performed low temperature shot noise measurements in superconductor (TiN) strongly disordered normal metal (heavily doped Si) weakly transparent junctions. We show that the conductance has a maximum due to coherent multiple Andreev reflections at low energy and that the shot noise is then twice the Poisson noise (S=4eI). When the subgap conductance reaches its minimum at finite voltage the shot noise changes to the normal value (S=2eI) due to a large quasiparticle contribution.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| TiN Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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