Metastable filamentary vortex flow in thin film superconductors.
Metastable filamentary vortex flow in thin film superconductors.
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DOI：
10.1103/physrevlett.76.2985
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发表时间：
1996-04
影响因子：
8.6
通讯作者：
Niels Grønbech-Jensen;Bishop;Domínguez
中科院分区：
文献类型：
--
作者：
Niels Grønbech-Jensen;Bishop;Domínguez
我们提出了非晶二维薄膜超导体中涡流动力学的模拟，使用一种新的精确方法来评估涡流之间的长程相互作用。我们发现增加电流的耗散开始主要由丝状流动通道主导，该流动通道在偏置电流的有限范围内稳定。这导致了微分电阻的新步骤，这与历史密切相关。我们的结果与最近关于非晶 Mo{sub 77}Ge{sub 23} 超导薄膜的实验非常吻合。 {版权} {ital 1996 美国物理学会。}
We present simulations of vortex dynamics in amorphous two-dimensional thin film superconductors, using a new exact method to evaluate long-range interactions between vortices. We find that the onset of dissipation for increasing current is dominated by filamentary channels of flow which are stable in a finite range of bias current. This results in novel steps in the differential resistance, which are strongly history dependent. Our results are in good agreement with recent experiments on amorphous Mo{sub 77}Ge{sub 23} superconducting thin films. {copyright} {ital 1996 The American Physical Society.}