13 research outputs found
Nonequilibrium Josephson effect in mesoscopic ballistic multiterminal SNS junctions
We present a detailed study of nonequilibrium Josephson currents and
conductance in ballistic multiterminal SNS-devices. Nonequilibrium is created
by means of quasiparticle injection from a normal reservoir connected to the
normal part of the junction. By applying a voltage at the normal reservoir the
Josephson current can be suppressed or the direction of the current can be
reversed. For a junction longer than the thermal length, , the
nonequilibrium current increases linearly with applied voltage, saturating at a
value equal to the equilibrium current of a short junction. The conductance
exhibits a finite bias anomaly around . For symmetric
injection, the conductance oscillates -periodically with the phase
difference between the superconductors, with position of the minimum
( or ) dependent on applied voltage and temperature. For
asymmetric injection, both the nonequilibrium Josephson current and the
conductance becomes -periodic in phase difference. Inclusion of barriers
at the NS-interfaces gives rise to a resonant behavior of the total Josephson
current with respect to junction length with a period . Both
three and four terminal junctions are studied.Comment: 21 pages, 19 figures, submitted to Phys. Rev.
Quasi-particles in inhomogeneous superconductors and superfluids
SIGLEAvailable from British Library Document Supply Centre- DSC:DX97762 / BLDSC - British Library Document Supply CentreGBUnited Kingdo
Fisheries Centre research reports, Vol. 16, no. 2
Director's Foreward. Executive Summary. 1. Introduction. 2. Methods. 3. Results. 4. Discussion. Acknowledgements. References.Fisheries Centre (FC)UnreviewedFacultyResearcherGraduat