Little-Parks effect in single YBaCuO sub-micron rings

Daniela Stornaiuolo; Detlef Born; Domenico Montemurro; E. W. Carlson; Fabio Beltram; Francesco Tafuri; Franco Carillo; Gianpaolo Papari; M. Tinkham; Pasqualantonio Pingue; Y. Imry

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Little-Parks effect in single YBaCuO sub-micron rings

Authors: Daniela Stornaiuolo
Detlef Born
Domenico Montemurro
E. W. Carlson
Fabio Beltram
Francesco Tafuri
Franco Carillo
Gianpaolo Papari
M. Tinkham
Pasqualantonio Pingue
Y. Imry
Publication date: 1 January 2010
Publisher: 'American Physical Society (APS)'
Doi

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.Comment: 14 pages, 3 figure