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.
Little-Parks effect in single YBaCuO sub-micron rings
Papari, Gianpaolo;Tafuri, Francesco;Carillo, Franco;Beltram, Fabio;Born, Detlef;Montemurro, Domenico;Pingue, Pasqualantonio;
2010
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.File in questo prodotto:
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PhysRevB.81.054505.pdf
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