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arXiv 2104.07967cond-mat.supr-con
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混合超导态的电流诱导自组织

Current-induced self-organisation of mixed superconducting states

X. S. Brems, S. Mühlbauer, W. Y. Córdoba-Camacho, A. A. Shanenko, A. Vagov, R. Cubitt

摘要:

小角中子散射与输运测量相结合,用于研究电流诱导的中间混合态畴的形态在类型间超导体铌。我们报告的强大的自组织的涡晶格域的细长的平行条纹垂直于所施加的电流在稳态。理论计算支持了超结构形成的实验结果,突出了涡旋物质演化的重要细节。研究表明,一个自发图案的形成机制,是密切相关的低$κ$超导体的中间混合态的普遍物理。

英文摘要:

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-$κ$ superconductors.

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