Conductance Fluctuations in Mesoscopic Normal-Metal/Superconductor Samples
Klaus Hecker, Helmut Hegger, Alexander Altland, Klaus Fiegle
DOI 10.1103/PhysRevLett.79.1547 · Physical Review Letters
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Abstract
We study the magnetoconductance fluctuations of mesoscopic normal-metal/superconductor (NS) samples consisting of a gold wire in contact with a niobium film. The magnetic field strength is varied over a wide range, including values that are larger than the upper critical field Bc2 of niobium. In agreement with recent theoretical predictions we find that in the NS sample the rms of the conductance fluctuations (CF) is by a factor of 2.8±0.4 larger than in the high field regime where the entire system is driven normal conducting. Further characteristics of the CF are discussed.
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. | 8 | Pressure not reported | unknown |
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