Volume 83, Number 1, July 2008
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||16 June 2008|
Vortex configurations in mesoscopic superconducting triangles: Finite-size and shape effects
Department of Physics, University of Antwerpen - Groenenborgerlaan 171, B-2020 Antwerpen, Belgium, EU
2 Institute of Solid State Physics, Russian Academy of Sciences - Chernogolovka 142432, Russia
3 School of Physics and Astronomy, University of Manchester - Manchester M13 9PL, UK, EU
Accepted: 12 May 2008
Triangular-shaped mesoscopic superconductors are consistent with the symmetry of the Abrikosov vortex lattice resulting in a high stability of vortex patterns for commensurate vorticities. However, for non-commensurate vorticities, vortex configurations in triangles are not compatible with the sample shape. Here we present the first direct observation of vortex configurations in μm-sized niobium triangles using the Bitter decoration technique, and we analyze the vortex states in triangles by analytically solving the London equations and performing molecular-dynamics simulations. We found that filling rules with increasing vorticity can be formulated for triangles in a similar way as for mesoscopic disks where vortices form shells.
PACS: 74.78.Na – Mesoscopic and nanoscale systems / 74.20.De – Phenomenological theories (two-fluid, Ginzburg-Landau, etc.) / 74.25.Qt – Vortex lattices, flux pinning, flux creep
© EPLA, 2008
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