The properties of single submicron high-temperature superconductor (HTS) rings are investigated. The Little-Parks effect is observed and is accompanied by an anomalous behavior of the magnetic dependence of the resistance, which we ascribe to non-uniform vorticity (superfluid angular momentum) within the ring arms. This effect is linked to the peculiar HTS-relationship between the values of the coherence length and the London penetration depth.
Cite
@article{arxiv.1002.2548,
title = {Little-Parks effect in single YBaCuO sub-micron rings},
author = {Franco Carillo and Gianpaolo Papari and Daniela Stornaiuolo and Detlef Born and Domenico Montemurro and Pasqualantonio Pingue and Fabio Beltram and Francesco Tafuri},
journal= {arXiv preprint arXiv:1002.2548},
year = {2010}
}