EXPERIMENTAL DEMONSTRATION OF THE RIEDEL PEAK.
EXPERIMENTAL DEMONSTRATION OF THE RIEDEL PEAK.
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RIEDEL PEAK 的实验演示。
DOI：
10.1103/physrevlett.26.426
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发表时间：
1971
期刊：
影响因子：
--
通讯作者：
S. Shapiro
中科院分区：
文献类型：
--
作者：
C. Hamilton;S. Shapiro
本文详细测量了微波辐照下超导隧道结中交流约瑟夫森台阶的功率和频率特性。当2 α= 2 e V rf hf> 25时，与贝塞尔函数行为[J N（2 α）]的显著偏差开始出现。这些偏差在Werthamer的详细微观理论中得到了正确的预测，并且是交流约瑟夫森电流在fJ = 4 Δ h处的对数奇异性（即Riedel峰）的结果。
Careful measurements have been made of the power and frequency dependence of the ac Josephson steps in a superconducting tunnel junction exposed to microwave radiation. At values of 2 α= 2 e V rf hf> 25, significant deviations from Bessel function behavior [J N (2 α)] begin to occur. These deviations are correctly predicted in the detailed microscopic theory of Werthamer and are a consequence of the logarithmic singularity in the ac Josephson current at f J= 4 Δ h, ie, the Riedel peak.