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.

arXiv comment6 pages, 5 postscript figures. Version to appear in Phys. Rev. B

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• Moving Vortex Phases, Dynamical Symmetry Breaking, and Jamming for Vortices in Honeycomb Pinning Arrays
• Suppression of dissipation in Nb thin films with triangular antidot arrays by random removal of pinning sites
• Highly Effective Superconducting Vortex Pinning in Conformal Crystals
• Pinning, Ordering, and Dynamics of Vortices in Conformal Crystal and Gradient Pinning Arrays
• Enhancing superconducting critical current by randomness
• Vortex ratchet reversal at fractional matching fields in kagomé-like array with symmetric pinning centers
• Pinning, Flux Diodes, and Ratchets for Vortices Interacting with Conformal Pinning Arrays
• Vortex Dynamics, Pinning, and Magic Angles on Moiré Patterns
• Shear Banding, Intermittency, Jamming and Dynamic Phases for Skyrmions in Inhomogeneous Pinning Arrays
• Kink-antikink vortex transfer in periodic-plus-random pinning potential: Theoretical analysis and numerical experiments
• Skyrmion Dynamics and Transverse Mobility: Skyrmion Hall Angle Reversal on 2D Periodic Substrates with dc and Biharmonic ac Drives
• Direct visualization of magnetic vortex pinning in superconductors
• Vortex Transport and Pinning Effectiveness in Conformal Pinning Arrays
• The phase boundary of superconducting niobium thin films with antidot arrays fabricated with microsphere photolithography
• Shear Banding and Spatiotemporal Oscillations in Vortex Matter in Nanostructured Superconductors
• Collective Effects and Pattern Formation for Directional Locking of Disks Moving Through Obstacle Arrays
• Active Rheology and Anti-Commensuration Effects For Driven Probe Particles on Two Dimensional Periodic Pinning Substrates