Nonlocal paraconductance of small superconducting loops

N. E. Israeloff, F. Yu, Allen M Goldman, R. Bojko

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)2130-2133
Number of pages4
JournalPhysical review letters
Issue number13
StatePublished - 1993


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