Nonlocal paraconductance of small superconducting loops
N. E. Israeloff, F. Yu, A. M. Goldman, R. Bojko
DOI 10.1103/PhysRevLett.71.2130 · Physical Review Letters
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Abstract
The nonlocal current response to an electric field characteristic of the superconducting state has been predicted to be observable in the paraconductive regime above the transition temperature Tc over a length scale set by the correlation length for superconducting fluctuations, Ξ(T). A manifestation of this effect has been found in a multiterminal measurement of a square superconducting loop of characteristic size, L∼Ξ(T). The ratio of the voltages measured by two different sets of probes attached to the loop at different positions is observed to oscillate as a function of the flux threading the loop. This nonlocal effect is distinct from analogous phenomena associated with the coherent transport of electrons in mesoscopic structures.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.26 | Pressure not reported | unknown |
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