Switching current distributions in InAs nanowire Josephson junctions

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• 作者：Bum-Kyu Kim ; Yong-Joo Doh
• 刊名：Journal of the Korean Physical Society
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：69
• 期：3
• 页码：349-353
• 全文大小：597 KB
• 刊物主题：Physics, general; Theoretical, Mathematical and Computational Physics; Particle and Nuclear Physics;
• 出版者：Springer Netherlands
• ISSN：1976-8524
• 卷排序：69

文摘

We report on the switching current distributions in nano-hybrid Josephson junctions made of InAs semiconductor nanowires. The temperature dependence of the switching current distribution can be understood through the motion of Josephson phase particles escaping from a tilted washboard potential, and the data could be fitted well by using the macroscopic quantum tunneling, thermal activation or phase diffusion models, depending on temperature. Application of the gate voltage to tune the Josephson coupling strength enable us to adjust the effective temperature for the escape process, and holds promising for developing gate-tunable superconducting phase qubits.KeywordsNanowireSuperconducting weak linkMacroscopic quantum tunneling