论文标题
具有AC Josephson效应的热模型，用于分流的超导弱链接
A thermal model with AC Josephson effect for a shunted superconducting weak-link
论文作者
论文摘要
超导弱链接（WL）的行为像约瑟夫森交界处（JJ），是许多超导器件（例如纳米Quids，单光子探测器和侧强度计）的基础。 JJ中独特的非线性动力学与不可避免的焦耳加热之间的相互作用导致了新的特征。在这里，我们报告了一个时间依赖的模型，该模型在AC约瑟夫森（Josephson）体制中纳入了由电阻器与电感器一起分流的约瑟夫森（Josephson）WL，以研究动力学以及所得的电流 - 电压特性。我们发现，由于纯电阻分流，相位和温度振荡的动态状态简单地扩大。然而，与热时间尺度竞争的分流循环中有明显的电感时间尺度引入了动态状态中的高频松弛振荡。基于数值分析，我们为不同的参数制度提供了状态图。我们的模型是更好地控制基于WL设备的实验中参数的指南。
Superconducting weak-link (WL), behaving like a Josephson junction (JJ), is fundamental to many superconducting devices such as nanoSQUIDs, single-photon detectors, and bolometers. The interplay between unique nonlinear dynamics and inevitable Joule heating in a JJ leads to new characteristics. Here, we report a time-dependent model incorporating thermal effect in the AC Josephson regime for a Josephson WL shunted by a resistor together with an inductor to investigate the dynamics as well as the resulting current-voltage characteristics. We find that the dynamic regime where phase and temperature oscillate simply widens due to a pure resistive shunt. However, a significant inductive time-scale in the shunt loop, competing with the thermal time-scale, introduces high-frequency relaxation oscillations in the dynamic regime. Based on numerical analysis, we present state diagrams for different parameter regimes. Our model is a guide for better controlling the parameters in the experiments of WL-based devices.
