Nonlinear self-coupling of Josephson radiation in superconducting tunnel junctions
Nonlinear self-coupling of Josephson radiation in superconducting tunnel junctions
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DOI：
10.1103/physrev.147.255
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发表时间：
1966-07
期刊：
影响因子：
--
通讯作者：
N. Werthamer
中科院分区：
文献类型：
--
作者：
N. Werthamer
研究了超导隧道结中交流隧穿电流（最早由Josephson提出）的非线性反馈，通过电流辐射的电磁场进入结的共振模式结构。研究了结工作点，并计算了强自耦合基模和弱自耦合谐波模所产生的直流电流。注意到Riedel简要报告的隧道电流振幅的频率依赖性，作为对在e V= 2 Δ（整数）处观察到的电流-电压特性的颠簸的试探性解释，其中2 Δ是能量间隙。
A study is made of the nonlinear feedback of the ac tunnelling current (first pointed out by Josephson) in a superconducting tunnel junction via the electromagnetic fields radiated by the current into the resonantmode structure of the junction. The junction operating point is investigated, and a calculation is made of the dc current drawn by a strongly self-coupled fundamental mode together with weakly self-coupled harmonic modes. Attention is directed to the frequency dependence of the tunneling-current amplitudes reported briefly by Riedel, as tentative explanation of the bumps in current-voltage characteristics which have been observed at e V= 2 Δ (integer), where 2 Δ is the energy gap.