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Narrow commensurate states induced by a periodic array of nanoscale antidots in Nb superconductor

Narrow commensurate states induced by a periodic array of nanoscale antidots in Nb superconductor
Narrow commensurate states induced by a periodic array of nanoscale antidots in Nb superconductor
We examine the interactions of the vortex lattice with a periodic square array of holes in a superconducting Nb film. Using high-resolution magnetic-field measurements of electrical losses, extremely narrow states with a magnetic field width reaching 1% of the matching field value are found at the commensurate points. They are accompanied by pronounced harmonic generation in response to ac modulation of the magnetic field or current. We relate these sharp anomalies to a locked commensurate state with characteristics of a Mott insulator. This offers opportunities for applications of superconducting films with periodic hole arrays as sensitive magnetic field detectors.
0003-6951
4217-4219
Zhukov, A.A.
75d64070-ea67-4984-ae75-4d5798cd3c61
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Metlushko, V.V.
ab23ba1e-f493-4e59-a671-e9dbcf4d8b74
Ilic, B.
04d0e6a5-ff41-4fb4-b769-d09f06f487b3
Zhukov, A.A.
75d64070-ea67-4984-ae75-4d5798cd3c61
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Metlushko, V.V.
ab23ba1e-f493-4e59-a671-e9dbcf4d8b74
Ilic, B.
04d0e6a5-ff41-4fb4-b769-d09f06f487b3

Zhukov, A.A., de Groot, P.A.J., Metlushko, V.V. and Ilic, B. (2003) Narrow commensurate states induced by a periodic array of nanoscale antidots in Nb superconductor. Applied Physics Letters, 83 (20), 4217-4219. (doi:10.1063/1.1627478).

Record type: Article

Abstract

We examine the interactions of the vortex lattice with a periodic square array of holes in a superconducting Nb film. Using high-resolution magnetic-field measurements of electrical losses, extremely narrow states with a magnetic field width reaching 1% of the matching field value are found at the commensurate points. They are accompanied by pronounced harmonic generation in response to ac modulation of the magnetic field or current. We relate these sharp anomalies to a locked commensurate state with characteristics of a Mott insulator. This offers opportunities for applications of superconducting films with periodic hole arrays as sensitive magnetic field detectors.

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Published date: November 2003

Identifiers

Local EPrints ID: 14735
URI: http://eprints.soton.ac.uk/id/eprint/14735
ISSN: 0003-6951
PURE UUID: 5c4c021b-4e35-446b-837b-25cf954a6331

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Date deposited: 01 Mar 2005
Last modified: 15 Jul 2019 19:33

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