Vortex deformation and breaking in superconductors: A microscopic description

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dc.creatorPardo, E.
dc.creatorDurrell, J. H.
dc.creatorBlamire, M. G.
dc.date2007-01-08
dc.date2007-09-26
dc.date.accessioned2026-07-07T08:32:09Z
dc.date.available2026-07-07T08:32:09Z
dc.descriptionVortex breaking has been traditionally studied for nonuniform critical current densities, although it may also appear due to nonuniform pinning force distributions. In this article we study the case of a high-pinning/low-pinning/high-pinning layered structure. We have developed an elastic model for describing the deformation of a vortex in these systems in the presence of a uniform transport current density $J$ for any arbitrary orientation of the transport current and the magnetic field. If $J$ is above a certain critical value, $J_c$, the vortex breaks and a finite effective resistance appears. Our model can be applied to some experimental configurations where vortex breaking naturally exists. This is the case for YBa$_2$Cu$_3$O$_{7-x}$ (YBCO) low angle grain boundaries and films on vicinal substrates, where the breaking is experienced by Abrikosov-Josephson vortices (AJV) and Josephson string vortices (SV), respectively. With our model, we have experimentally extracted some intrinsic parameters of the AJV and SV, such as the line tension $ε_l$ and compared it to existing predictions based on the vortex structure.
dc.description11 figures in 13 files; minor changes after printing proofs
dc.identifierhttps://arxiv.org/abs/cond-mat/0701150
dc.identifierhttp://arxiv.org/abs/cond-mat/0701150
dc.identifierPhilosophical Magazine, Vol. 87, No. 28, 1st October 2007, 4359-4381
dc.identifierdoi:10.1080/14786430701531006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/138712
dc.subjectSuperconductivity
dc.titleVortex deformation and breaking in superconductors: A microscopic description
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