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Superconducting NbN nanowires and coherent quantum phase-slips in dc transport

Fenton, JC; Burnett, J; (2016) Superconducting NbN nanowires and coherent quantum phase-slips in dc transport. IEEE Transactions on Applied Superconductivity , 26 (3) , Article 2200505. 10.1109/TASC.2016.2531005. Green open access

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Abstract

A quantum current standard dual to the Josephson voltage standard has been trumpeted as a primary application for the phenomenon of coherent quantum phase-slips (CQPS) in superconducting nanowires, but it requires a dc transport geometry, distinct from the ring geometry in which CQPS have been probed by microwave spectroscopy measurements. We present measurements on NbN nanowires with width 15~nm and including integrated thin-film resistors to provide a high-impedance environment. Analysis shows that the nanowire behaviour is in line with expectations. The results demonstrate that the process is promising both for future dc transport CQPS measurements and for the fabrication of other circuits in which low-width superconducting nanowires are required.

Type: Article
Title: Superconducting NbN nanowires and coherent quantum phase-slips in dc transport
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/TASC.2016.2531005
Publisher version: http://dx.doi.org/10.1109/TASC.2016.2531005
Language: English
Additional information: Copyright © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Keywords: superconductor-insulator transition, electron-beam lithography, HSQ
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/1476285
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