Little-Parks effect in single YBaCuO sub-micron rings
Franco Carillo, Gianpaolo Papari, Daniela Stornaiuolo, Detlef Born,, Domenico Montemurro, Pasqualantonio Pingue, Fabio Beltram, Francesco Tafuri
TL;DR
This study observes the Little-Parks effect in single submicron YBaCuO rings, revealing anomalous magnetic resistance behavior linked to non-uniform vorticity and high-temperature superconductor properties.
Contribution
It reports the first observation of the Little-Parks effect in high-temperature superconductor rings and links it to unique HTS characteristics affecting vorticity.
Findings
Observation of Little-Parks oscillations in YBaCuO rings
Anomalous magnetic resistance behavior linked to non-uniform vorticity
Connection between effect and HTS coherence length and penetration depth
Abstract
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.
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