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arXiv 1108.2697cond-mat.supr-con
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约瑟夫逊耦合平行板谐振器的电动力学

Electrodynamics of the Josephson-Coupled Parallel Plate Resonator

Vladimir V. Talanov

摘要:

研究了超导平行板谐振器中的本征振荡。虽然绝缘体厚度S从几十微米下降到超导波函数到电介质的衰减长度尺度,λ ~1 nm,但谐振频率和Q因子都非单调地变化高达三个数量级。Swihart波和Josephson等离子体激元之间的交叉导致谐振频率的全局最小值和Q因子在S~10ξ处的局部最大值。

英文摘要:

Eigen oscillations in a superconducting parallel plate resonator with the Josephson-coupled plates are investigated. While the insulator thickness S changes from tens of microns down to the decay lengthscale of the superconducting wavefunction into a dielectric, ξ~1 nm, both the resonant frequency and Q-factor vary non-monotonically by up to three orders in magnitude. A crossover between the Swihart waves and Josephson plasmons causes a global minimum in the resonant frequency and a local maximum in the Q-factor at S~10ξ.

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