Realization of artificial ice systems for magnetic vortices in a superconducting MoGe thin film with patterned nanostructures

M. L. Latimer, G. R. Berdiyorov, Z. L. Xiao, F. M. Peeters, W. K. Kwok

Research output: Contribution to journalArticle

50 Citations (Scopus)

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.

Original languageEnglish
Article number067001
JournalPhysical Review Letters
Volume111
Issue number6
DOIs
Publication statusPublished - 5 Aug 2013

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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