Josephson interference phenomena above Tc

Efrat Shimshoni; Paul M. Goldbart; Nigel Goldenfeld

doi:10.1103/physrevb.48.9865

Josephson interference phenomena above Tc

Efrat Shimshoni, Paul M. Goldbart, Nigel Goldenfeld

University of Illinois at Urbana-Champaign

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Superconducting fluctuations induce remnants of the Josephson effect above Tc. To explore this, we consider a paraconducting cylinder, composed of two thin films connected by tunnel junctions, and threaded by magnetic flux. The electrical conductance includes a component that is an oscillatory function of the flux, having an amplitude proportional to the square of the Josephson coupling, and decaying exponentially with the circumference over a length scale ξ(T). We estimate the typical magnitude of this effect, and contrast it with related mesoscopic effects in normal-metal systems.

Original language	English
Pages (from-to)	9865-9868
Number of pages	4
Journal	Physical Review B
Volume	48
Issue number	13
DOIs	https://doi.org/10.1103/physrevb.48.9865
State	Published - 1993
Externally published	Yes

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AB - Superconducting fluctuations induce remnants of the Josephson effect above Tc. To explore this, we consider a paraconducting cylinder, composed of two thin films connected by tunnel junctions, and threaded by magnetic flux. The electrical conductance includes a component that is an oscillatory function of the flux, having an amplitude proportional to the square of the Josephson coupling, and decaying exponentially with the circumference over a length scale ξ(T). We estimate the typical magnitude of this effect, and contrast it with related mesoscopic effects in normal-metal systems.

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Josephson interference phenomena above Tc

Abstract

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