Enhancing the critical current in quasiperiodic pinning arrays below and above the matching magnetic flux

Details Enhancing the critical current in quasiperiodic pinning arrays below and above the matching magnetic flux Enhancing the critical current in quasiperiodic pinning arrays below and above the matching magnetic flux

2010-10-24

arxiv.org/abs/1010.5015v1

Phys. Rev. B 82, 184512 (2010)

Physics

Condensed Matter

Superconductivity

7 pages, 4 figures

Scientific paper

10.1103/PhysRevB.82.184512

Quasiperiodic pinning arrays, as recently demonstrated theoretically and experimentally using a five-fold Penrose tiling, can lead to a significant enhancement of the critical current Ic as compared to "traditional" regular pinning arrays. However, while regular arrays showed only a sharp peak in Ic(Phi) at the matching flux Phi1 and quasiperiodic arrays provided a much broader maximum at PhiPhi1 by using non-Penrose quasiperiodic pinning arrays. This result is based on a qualitatively different mechanism of flux pinning by quasiperiodic pinning arrays and could be potentially useful for applications in superconducting micro-electronic devices operating in a broad range of magnetic fields.

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