Vortex matter in mesoscopic two-gap superconductor square
Vortex matter in mesoscopic two-gap superconductor square
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DOI：
10.1103/physrevb.84.144504
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发表时间：
2011-10
影响因子：
3.7
通讯作者：
P. J. Pereira;L. Chibotaru;V. Moshchalkov
中科院分区：
文献类型：
--
作者：
P. J. Pereira;L. Chibotaru;V. Moshchalkov
在低本征钉钉的介观超导体中，边界对涡旋图形的稳定起着最重要的作用。特别是在对称的样品形状下，对于不同的涡度状态，在样品内部定义了非常明显的涡位置。用金兹堡-朗道方程研究双组分超导体意味着在两种凝聚物之间引入一个耦合项，改变势的线性部分。本文分析了耦合项和约束几何之间的竞争对由双间隙超导体制成的介观方形薄样品涡图的影响。对于这里提出的一个简单的例子，我们发现非复合涡旋的出现伴随着与被动带相关的阶参数分量作为温度函数的不寻常形状。这种形状是具有非复合涡旋的材料的独特指纹。
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.