Parity-Affected Persistent Currents in Superconducting Nanorings
Mesoscale and Nanoscale Physics
2009-11-10 v2 Superconductivity
Abstract
We argue that at sufficiently low temperatures T superconducting parity effect may strongly influence equilibrium persistent currents (PC) in isolated superconducting nanorings containing a weak link with few conducting modes. For a single channel quantum point contact at T=0 we predict a novel effect of parity-induced blocking of PC. In nanorings with SNS junctions a -state can occur for the odd number of electrons. Changing this number from even to odd yields spontaneous supercurrent in the ground state of such rings without any externally applied magnetic flux.
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Cite
@article{arxiv.cond-mat/0401338,
title = {Parity-Affected Persistent Currents in Superconducting Nanorings},
author = {Sergei V. Sharov and Andrei D. Zaikin},
journal= {arXiv preprint arXiv:cond-mat/0401338},
year = {2009}
}
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