Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
J Phys Condens Matter. 2013 Aug 14;25(32):325701. doi: 10.1088/0953-8984/25/32/325701. Epub 2013 Jul 10.
Recently, transport measurements have been carried out in resistively shunted long superconducting nanowires (Brenner et al 2012 Phys. Rev. B 85 224507). The measured voltage-current (V-I) characteristics were explained by the appearance of the phase slip centers in the shunted wire, and the whole wire was modeled as a single Josephson junction. The kinetic inductance of the long nanowires used in experiments is generally large. Here we argue that the shunted superconducting nanowire acts as a Josephson junction in series with an inductor. The inductance depends on the length and the cross section of the wire. The inclusion of inductance in our analysis modifies the V-I curves, and increases the rate of switching from the superconducting state to the resistive state. The quantitative differences can be quite large in some practical parameter sets, and might be important to properly understand the experimental results. Our proposed model can be verified experimentally by studying the shunted superconducting nanowires of different lengths and cross sections.
最近，在电阻分流的长超导纳米线中进行了输运测量（Brenner 等人，2012 年，《物理评论 B》第 85 卷，224507）。通过在分流线中出现相位滑移中心，对测量得到的电压-电流（V-I）特性进行了解释，整个线被建模为单个约瑟夫森结。实验中使用的长纳米线的动力学电感通常较大。在这里，我们认为分流超导纳米线作为一个与电感串联的约瑟夫森结。电感取决于线的长度和横截面。在我们的分析中包含电感会改变 V-I 曲线，并增加从超导状态到电阻状态的转换速率。在某些实际参数设置中，定量差异可能相当大，这对于正确理解实验结果可能很重要。我们提出的模型可以通过研究不同长度和横截面的分流超导纳米线来进行实验验证。
