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首页> 外文期刊>Journal of Low Temperature Physics >Vortex Structures in Exponentially Shaped Josephson Junctions
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Vortex Structures in Exponentially Shaped Josephson Junctions

机译:指数形约瑟夫森交界处的涡旋结构

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We report the numerical calculations of the static vortex structure and critical curves in exponentially shaped long Josephson junctions for in-line and overlap geometries. Stability of the static solutions is investigated by checking the sign of the smallest eigenvalue of the associated Sturm-Liouville problem. The change in the junction width leads to the renormalization of the magnetic flux in comparison with the case of a linear one-dimensional model. We study the influence of the models parameters, and particularly, the shape parameter on the stability of the states of the magnetic flux. We compare the vortex structure and critical curves for the in-line and overlap geome-tries. Our numerically constructed critical curve of the Josephson junction matches well with the experimental one.
机译:我们报告了呈直线和重叠几何形状的指数形长约瑟夫森结中静态涡旋结构和临界曲线的数值计算。通过检查相关Sturm-Liouville问题的最小特征值的符号来研究静态解的稳定性。与线性一维模型的情况相比,结宽的变化导致磁通量的重新归一化。我们研究了模型参数,尤其是形状参数对磁通状态稳定性的影响。我们比较了在线几何和重叠几何的涡旋结构和临界曲线。我们用数字构造的约瑟夫森结的临界曲线与实验曲线非常吻合。

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