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Mapping degenerate vortex states in a kagome lattice of elongated antidots via scanning Hall probe microscopy

Journal Contribution - Journal Article

We investigate the degeneracy of the superconducting vortex matter ground state by directly visualizing the vortex configurations in a kagome lattice of elongated antidots via scanning Hall probe microscopy. The observed vortex patterns, at specific applied magnetic fields, are in good agreement with the configurations obtained using time-dependent Ginzburg-Landau simulations. Both results indicate that the long-range interaction in this nanostructured superconductor is unable to lift the degeneracy between different vortex states and the pattern formation is mainly ruled by the nearest-neighbor interaction. This simplification makes it possible to identify a set of simple rules characterizing the vortex configurations.We demonstrate that these rules can explain both the observed vortex distributions and the magnetic-field-dependent degree of degeneracy.
Journal: Physical Review B
ISSN: 2469-9950
Issue: 2
Volume: 96
Pages: 1 - 6
Publication year:2017
BOF-keylabel:yes
IOF-keylabel:yes
BOF-publication weight:1
CSS-citation score:1
Authors:International
Authors from:Higher Education
Accessibility:Open