Title
Realization of artificial ice systems for magnetic vortices in a superconducting MoGe thin film with patterned nanostructuresRealization of artificial ice systems for magnetic vortices in a superconducting MoGe thin film with patterned nanostructures
Author
Faculty/Department
Faculty of Sciences. Physics
Research group
Condensed Matter Theory
Publication type
article
Publication
New York, N.Y.,
Subject
Physics
Source (journal)
Physical review letters. - New York, N.Y.
Volume/pages
111(2013):6, p. 1-5
ISSN
0031-9007
Article Reference
067001
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We report an anomalous matching effect in MoGe thin films containing pairs of circular holes arranged in such a way that four of those pairs meet at each vertex point of a square lattice. A remarkably pronounced fractional matching was observed in the magnetic field dependences of both the resistance and the critical current. At the half matching field the critical current can be even higher than that at zero field. This has never been observed before for vortices in superconductors with pinning arrays. Numerical simulations within the nonlinear Ginzburg-Landau theory reveal a square vortex ice configuration in the ground state at the half matching field and demonstrate similar characteristic features in the field dependence of the critical current, confirming the experimental realization of an artificial ice system for vortices for the first time.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/6be315/5526.pdf
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