C-axis persistent current and Cooper-pair tunneling through intrinsic Josephson junctions in a ring-shaped YBa2Cu3O7-δ film

Mansour, A. I.; Saber, M. M.; Chow, K. H.; Jung, J.
October 2008
Applied Physics Letters;10/6/2008, Vol. 93 Issue 14, p142509
Academic Journal
We report the direct experimental observation of the temperature dependence of the persistent current Icj due to tunneling Cooper pairs along the c-axis intrinsic Josephson junctions integrated into YBa2Cu3O7-δ ring-shaped thin films. The measured Icj exhibits a linear temperature dependence over a wide range of temperatures well below Tc. Similar behavior was observed in different samples, confirming the reproducibility of the fabrication technique and the reliability of the results.


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