Articolo in rivista, 2014, ENG, 10.1016/j.physc.2014.06.002

Resistive state triggered by vortex entry in YBa2Cu3O7-delta nanostructures

Arpaia, R.; Golubev, D.; Baghdadi, R.; Arzeo, M.; Kunakova, G.; Charpentier, S.; Nawaz, S.; Lombardi, F.; Bauch, T.

Chalmers University of Technology; Univ Naples Federico II, Dipartimento Sci Fis, CNR SPIN, I-80126 Naples, Italy;; Aalto University; University of Latvia

We have realized YBa2Cu3O7-delta nanowires and nano Superconducting Quantum Interference Devices (nanoSQUID). The measured temperature dependence of the wire resistances below the superconducting transition temperature has been analyzed using a thermally activated vortex entry model valid for wires wider than the superconducting coherence length. The extracted zero temperature values of the London penetration depth, lambda(0) similar or equal to 270 +/- 15 nm, are in good agreement with the value obtained from critical current modulations as a function of an externally applied magnetic field in a nanoSQUID implementing two nanowires. (C) 2014 Elsevier B.V. All rights reserved.

Physica. C, Superconductivity (Print) 506 , pp. 165–168

Keywords

High-temperature superconductors, Nanowires, NanoSQUIDs, Phase slips, Vortex dynamics

CNR authors

Arpaia Riccardo

CNR institutes

SPIN – Istituto superconduttori, materiali innovativi e dispositivi