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Nonequilibrium Josephson current in ballistic multiterminal SNS-junctions

P. Samuelsson·A. Ingerman·V. S. Shumeiko·G. Wendin
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Abstract

We study the nonequilibrium Josephson current in a long two-dimensional ballistic SNS-junction with a normal reservoir coupled to the normal part of the junction. The current for a given superconducting phase difference $ϕ$ oscillates as a function of voltage applied between the normal reservoir and the SNS-junction. The period of the oscillations is $π\hbar v_F/L$, with $L$ the length of the junction, and the amplitude of the oscillations decays as $V^{-3/2}$ for $eV \gg \hbar v_{F}/L$ and zero temperature. The critical current $I_c$ shows a similar oscillating, decaying behavior as a function of voltage, changing sign every oscillation. Normal specular or diffusive scattering at the NS-interfaces does not qualitatively change the picture.

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P. Samuelsson, A. Ingerman, V. S. Shumeiko, G. Wendin. 2000-05-08. Nonequilibrium Josephson current in ballistic multiterminal SNS-junctions. https://doi.org/10.1016/s0921-4534(00)01699-3

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