Current-phase relation of the SNS junction in a superconducting loopMun Dae Kim1 and Jongbae Hong2
1 Korea Institute for Advanced Study - Seoul 130-722, Korea
2 School of Physics, Seoul National University - Seoul 151-742, Korea
received 7 October 2005; accepted in final form 24 October 2005
published online 23 November 2005
We study the current-phase relation of the superconductor/normal/superconductor (SNS) junction imbedded in a superconducting loop. Considering the current conservation and free energy minimum conditions, we obtain the persistent currents of the SNS loop. At finite temperature we can explain the experimentally observed highly non-sinusoidal currents which have maxima near the zero external flux.
74.72.Jt - Other cuprates, including Tl and Hg-based cuprates.
74.45.+c - Proximity effects; Andreev effect; SN and SNS junctions.
73.23.Ra - Persistent currents.
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