Commensurability Effects at Nonmatching Fields for Vortices in Diluted Periodic Pinning Arrays

Abstract

Using numerical simulations, we demonstrate that superconductors containing periodic pinning arrays which have been diluted through random removal of a fraction of the pins have pronounced commensurability effects at the same magnetic field strength as undiluted pinning arrays. The commensuration can occur at fields significantly higher than the matching field, produces much greater critical current enhancement than a random pinning arrangement due to suppresion of vortex channeling, and persists for arrays with up to 90% dilution. These results suggest that diluted periodic pinning arrays may be a promising geometry to increase the critical current in superconductors over a wide magnetic field range.

6 pages, 5 postscript figures. Version to appear in Phys. Rev. B

References in corpus (4)

• Observation of Vortex Pinning in Bose-Einstein Condensates
• Commensurability effects in superconducting Nb films with quasiperiodic pinning arrays
• Enhanced pinning and proliferation of matching effects in a superconducting film with a Penrose array of magnetic dots
• Pinning and collective modes of a vortex lattice in a Bose-Einstein condensate

Cited by in corpus (5)

• Moving Vortex Phases, Dynamical Symmetry Breaking, and Jamming for Vortices in Honeycomb Pinning Arrays
• Pinning, Ordering, and Dynamics of Vortices in Conformal Crystal and Gradient Pinning Arrays
• Vortex ratchet reversal at fractional matching fields in kagomé-like array with symmetric pinning centers
• Direct visualization of magnetic vortex pinning in superconductors
• Active Rheology and Anti-Commensuration Effects For Driven Probe Particles on Two Dimensional Periodic Pinning Substrates