Nonlinear Self-Coupling of Josephson Radiation in Superconducting Tunnel Junctions

作者：N. R. Werthamer · 发表于：Physical Review · 年份：1966 · DOI：10.1103/physrev.147.255 · 被引用次数：542 · 研究领域：Physics of Superconductivity and Magnetism、Quantum and electron transport phenomena、Advanced Electrical Measurement Techniques

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 $eV=\frac{2\ensuremath{\Delta}}{(\mathrm{integer})}$, where $2\ensuremath{\Delta}$ is the energy gap.