Nonequilibrium Josephson current in ballistic multiterminal SNS-junctions

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 $\varphi$ oscillates as a function of voltage applied between the normal reservoir and the SNS-junction. The period of the oscillations is $\pi \hslash v_F/L$, with $L$ the length of the junction, and the amplitude of the oscillations decays as $V^{-3/2}$ for $eV\gg \hslash v_F/L$ 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.

Proceeding of MS2000, to appear in Physica C

References in corpus (2)

• Observation of supercurrent enhancement in SNS junctions by non-equilibrium injection into supercurrent carrying bound Andreev states
• Suppression and enhancement of the critical current in multiterminal S/N/S mesoscopic structures

Cited by in corpus (2)

• Nonequilibrium Josephson effect in short-arm diffusive SNS interferometers
• Andreev non-Hermitian Hamiltonian for open Josephson junctions from Green's functions