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Observation of coherent Josephson response in the non-linear ab-plane microwave impedance of $YBa_{2}Cu_{3}O_{6.95}$ single crystals

Z. Zhai·H. Srikanth·S. Sridhar·A. Erb·E. Walker·R. Flukiger
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Abstract

We report novel non-linear phenomena in the $ab$-plane microwave impedance of $YBaCu_{2}O_{7-δ}$ single crystals. The $R_s$ vs. $H_{rf}$ data are well described by the non-linear RSJ model : $\dotϕ+\sin ϕ=i_{rf}\cos ωt$. The entire crystal behaves like a single Josephson junction. The extraordinary coherence of the data suggests an intrinsic mechanism.

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Z. Zhai, H. Srikanth, S. Sridhar, A. Erb, E. Walker, R. Flukiger. 1997-08-05. Observation of coherent Josephson response in the non-linear ab-plane microwave impedance of $YBa_{2}Cu_{3}O_{6.95}$ single crystals. https://doi.org/10.1016/s0921-4534(97)00884-8

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