Influence of Josephson Junction Parameters on Shapiro Steps

LIU Fei-lian; ZHOU Tie-ge; WANG Ding-cheng; LI Na; ZHAO Xin-jie; FANG Lan; YAN Shao-lin

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Influence of Josephson Junction Parameters on Shapiro Steps

更新时间：2025-07-16

- Influence of Josephson Junction Parameters on Shapiro Steps
- Acta Electronica Sinica Vol. 37, Issue 5, Pages: 957-960(2009)
- 作者机构：
  
  南开大学电子系,天津,300071
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN12
- Published：2009
- 稿件说明：
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LIU Fei-lian, ZHOU Tie-ge, WANG Ding-cheng, et al. Influence of Josephson Junction Parameters on Shapiro Steps[J]. Acta Electronica Sinica, 2009, 37(5): 957-960.
DOI：

LIU Fei-lian, ZHOU Tie-ge, WANG Ding-cheng, et al. Influence of Josephson Junction Parameters on Shapiro Steps[J]. Acta Electronica Sinica, 2009, 37(5): 957-960. DOI：

摘要

采用PSpice电路仿真的方法

研究了结电容

较小的情况下

电阻电容并联约瑟夫森结模型的参数(临界电流

和正常态电阻

)对Shapiro台阶高度的影响.发现在射频电流较大的情况下减小

可以提高台阶的高度

而在射频电流较小的情况下增加

可以提高台阶的高度.保持

不变

取不同

绘制的台阶高度－射频电流幅度曲线表明

临界电流越大

曲线所对应的台阶高度也越大.研究结果对利用约瑟夫森结作为电压标准和THz信号检测具有指导意义.

Abstract

The simulating model of Josephson junctions in PSpice is constructed and used in the investigation of Shapiro steps.In the condition of little capacitance

we have researched the influence of resistively and capacitively shunted Josephson junction's parameters

including critical current and normal resistance

on Shapiro steps.We found that it can improve the steps by both to reduce the normal resistance under a larger rf-current circumstance and to increase the normal resistance in the condition of a smaller rf-current.We also found that the larger the junction critical current

the higher the Shapiro steps

when the junction resistance keeps constant.The results are of important referential value for the voltage standard and THz signal detection by Josephson junctions.

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Related Author

SONG Feng-bin

WANG Zheng

YUE Hong-wei

YAN Shao-lin

ZHOU Tie-ge

FAN Bin

ZHAO Xin-jie

HE Ming

Related Institution

College of Information and Communication,Guilin University of Electronic Technology

Department of ElectronicsNankai UniversityTianjin 300071China

College of Information and CommunicationGuilin University of Electronic TechnologyGuilinGuangxi 541004China

Research Institute of Superconductor Electronics,Department of Electronic Science and Engineering,Nanjing University

Shanghai Jiao Tong University

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