Neal, J.S., Milosevic, M.V., Bending, S.J. et al. (3 more authors) (2007) Competing symmetries and broken bonds in superconducting vortex-antivortex molecular crystals. Physical Review Letters, 99 (127001). ISSN 1079-7114
Abstract
Hall probe microscopy has been used to image vortex-antivortex molecules induced in superconducting Pb films by the stray fields from square arrays of magnetic dots. We have directly observed spontaneous vortex-antivortex pairs and studied how they interact with added free (anti)fluxons in an applied magnetic field. We observe a variety of phenomena arising from competing symmetries which either drive added antivortices to join antivortex shells around dots or stabilize the translationally symmetric antivortex lattice between the dots. Added vortices annihilate antivortex shells, leading first to a stable “nulling state” with no free fluxons and then, at high densities, to vortex shells around the dots stabilized by the asymmetric antipinning potential. Our experimental findings are in good agreement with Ginzburg-Landau calculations.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2007 American Physical Society. This is an author produced version of a paper published in Physical Review Letters. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) |
Depositing User: | Sherpa Assistant |
Date Deposited: | 03 Dec 2007 16:26 |
Last Modified: | 26 Oct 2016 11:53 |
Published Version: | http://dx.doi.org/10.1103/PhysRevLett.99.127001 |
Status: | Published |
Publisher: | American Physical Society |
Refereed: | Yes |
Identification Number: | 10.1103/PhysRevLett.99.127001 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:3516 |