Numerical analysis of temperature and current distributions in large-size intrinsic Josephson junctions with self-heating
Numerical analysis of temperature and current distributions in large-size intrinsic Josephson junctions with self-heating
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DOI：
10.1063/5.0018989
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发表时间：
2020-08-01
期刊：
影响因子：
1.6
通讯作者：
Tsukamoto, Takehiko
中科院分区：
文献类型：
--
作者：
Oikawa, Dai;Mitarai, Haruki;Tsukamoto, Takehiko
在这项研究中，我们重点研究具有自热效应的电压状态大尺寸本征约瑟夫森结（IJJ）台面中的温度和电流分布。由于很难通过实验获得 IJJ 台面中的温度和电流分布，因此我们通过求解非线性扩散和温度相关电路方程来数值计算这些分布。台面局部温度超过临界温度，高偏压区域出现常态。对于电流-电压（I-V）特性的每个偏置点，获得了不均匀的温度和电流密度分布。归一化的 c 轴电流分布随着高偏置区域中偏置电流的增加而减小。这些结果可以使用与温度相关的 c 轴电阻率来解释。
In this study, we focused on temperature and current distributions in voltage-state large-size intrinsic Josephson junction (IJJ) mesas with a self-heating effect. Because it is difficult to experimentally obtain temperature and current distributions in IJJ mesas, we numerically computed these distributions by solving non-linear diffusion and temperature dependence circuit equations. The local temperature in the mesa exceeded the critical temperature, and a normal-state appeared in the high bias region. Non-uniform temperature and current density distributions were obtained for each bias point of the current-voltage (I-V) characteristics. Normalized c-axis current distributions decreased with an increase in the bias current in the high bias regions. These results were explained using temperature dependent c-axis resistivity.