\begin{document}$I/I_{\rm{c}}$\end{document} and \begin{document}${\rm{d}}\varphi/{\rm{d}}\tau,\,\tau=\omega_{\rm{c}}t$\end{document} (with \begin{document}$\omega_{\rm{c}}$\end{document} being the plasmon frequency) is obtained from the measured \begin{document}$I\text-V$\end{document} curve. Using the standard resistively capacitance shunted junction model to fit such a relation, the damping coefficient of the junction can be estimated. With the estimated critical current, capacitance, and damping coefficient, the resistance \begin{document}$R_n$\end{document} of the junction at the working temperature is calibrated consequently. It is shown that our estimated results are in good agreement with that predicted by the famous Ambgaokar-Baratoff formula. Physically, the method demonstrated here possesses two advantages. First, it is relatively insensitive to the noise during the measurement of the junction's I-V characteristic curve, compared with the usual method to calibrate damping coefficient by measuring the ratio of hysteresis current to critical current. Second, only the low frequency driving is required to measure the jump current of the junction for estimating the damping coefficient. The microwave driving is not necessary. Hopefully, the present work is useful for the on-demand designs of the Josephson junctions for various applications."> - 必威体育下载

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Citation:

    Han Jin-Ge, Ouyang Peng-Hui, Li En-Ping, Wang Yi-Wen, Wei Lian-Fu
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    • Abstract views:6329
    • PDF Downloads:228
    • Cited By:0
    Publishing process
    • Received Date:02 March 2021
    • Accepted Date:23 April 2021
    • Available Online:07 June 2021
    • Published Online:05 September 2021

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