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||American English|
|Journal||Physical Review B (Condensed Matter and Materials Physics)|
|State||Published - 1993|
Bibliographical noteDepartment of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinos 61801-3080
Beckman Institute for Advanced Science and Technology, 405 North Mathews Avenue, Urbana, Illinois 61801