Transverse Commensurability Effect for Vortices in Periodic Pinning Arrays

Details Transverse Commensurability Effect for Vortices in Periodic Pinning Arrays Transverse Commensurability Effect for Vortices in Periodic Pinning Arrays

2008-08-11

arxiv.org/abs/0808.1579v1

Phys. Rev. B Rapid Communications 78, 180507(R) (2008)

Physics

Condensed Matter

Superconductivity

4 pages, 4 postscript figures

Scientific paper

10.1103/PhysRevB.78.180507

Using computer simulations, we demonstrate a new type of commensurability that occurs for vortices moving longitudinally through periodic pinning arrays in the presence of an additional transverse driving force. As a function of vortex density, there is a series of broad maxima in the transverse critical depinning force that do not fall at the matching fields where the number of vortices equals an integer multiple of the number of pinning sites. The commensurability effects are associated with dynamical states in which evenly spaced structures consisting of one or more moving rows of vortices form between rows of pinning sites. Remarkably, the critical transverse depinning force can be more than an order of magnitude larger than the longitudinal depinning force.

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