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Current-induced self-organisation of mixed superconducting states

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arxiv 2104.07967 v1 pith:JBAFTGMT submitted 2021-04-16 cond-mat.supr-con

Current-induced self-organisation of mixed superconducting states

classification cond-mat.supr-con
keywords mixedcurrent-induceddomainsformationintermediateself-organisationstatevortex
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Small-angle neutron scattering is used in combination with transport measurements to investigate the current-induced effects on the morphology of the intermediate mixed state domains in the intertype superconductor niobium. We report the robust self-organisation of the vortex lattice domains to elongated parallel stripes perpendicular to the applied current in a steady-state. The experimental results for the formation of the superstructure are supported by theoretical calculations, which highlight important details of the vortex matter evolution. The investigation demonstrates a mechanism of a spontaneous pattern formation that is closely related to the universal physics governing the intermediate mixed state in low-$\kappa$ superconductors.

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