London equation studies of thin-film superconductors with a triangular antidot lattice

Details London equation studies of thin-film superconductors with a triangular antidot lattice London equation studies of thin-film superconductors with a triangular antidot lattice

2001-05-31

arxiv.org/abs/cond-mat/0105601v1

Physics

Condensed Matter

Superconductivity

10 pages and 14 figures

Scientific paper

10.1103/PhysRevB.65.024503

We report on a study of vortex pinning in nanoscale antidot defect arrays in the context of the London Theory. Using a wire network model, we discretize the array with a fine mesh, thereby providing a detailed treatment of pinning phenomena. The use of a fine grid has enabled us to examine both circular and elongated defects, patterned in the form of a rhombus. The latter display pinning characteristics superior to circular defects constructed with the similar area. We calculate pinning potentials for defects containing zero and single quanta, and we obtain a pinning phase diagram for the second matching field, $H = 2 \Phi_{o}$.

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