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Vortex matter in mesoscopic two-gap superconductor square

机译：介观两能隙超导体中的涡旋物质

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摘要

In mesoscopic superconductors with low intrinsic pinning, the boundary plays the most important role in the stabilization of the vortex patterns. Especially in the case of symmetric sample shape, very distinct vortex locations inside the sample are defined, for the different vorticity states. The study of two-component superconductors with the Ginzburg-Landau equation implies the introduction of a coupling term between the two condensates, changing the linear part of the potential. This article presents the analysis of the impact of the competition between the coupling term and the geometry of confinement on the vortex patterns of thin mesoscopic square samples made from a two-gap superconductor. For a simple case presented here, it was found that the appearance of the noncomposite vortices is accompanied by an unusual shape of the component of the order parameter associated with the passive band as a function of the temperature. This shape is a distinct fingerprint for materials with noncomposite vortices.
机译：在具有低固有钉扎的介观超导体中，边界在涡旋图的稳定中起着最重要的作用。特别是在对称样品形状的情况下，对于不同的涡度状态，样品内部的涡旋位置非常不同。用Ginzburg-Landau方程研究双组分超导体意味着在两个冷凝物之间引入了耦合项，从而改变了电位的线性部分。本文分析了耦合项和约束几何之间的竞争对由两间隙超导体制成的薄介观方样品的涡旋图样的影响。对于此处介绍的一个简单案例，发现非复合涡旋的出现伴随着随温度变化而与无源带相关联的阶数参数分量的异常形状。对于具有非复合涡旋的材料，此形状是一个独特的指纹。

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