Impact of the transport supercurrent on the Josephson effect

Details Impact of the transport supercurrent on the Josephson effect Impact of the transport supercurrent on the Josephson effect

2004-04-30

arxiv.org/abs/cond-mat/0404738v1

In "Realizing Controllable Quantum States - In the Light of Quantum Computation", Proc. Int. Symp. on Mesoscopic Superconducti

Physics

Condensed Matter

Superconductivity

5 pages, 3 figures; submitted for publication in Proceedings of MS+S2004 symposium (without Sec.V and the last part of Sec.III

Scientific paper

We study the weak link between current-carrying superconductors, both conventional and d-wave. The state of the system is controlled by two parameters: the order parameter phase difference $\phi$ and the superfluid velocity $v_{s}$, which parameterizes the parallel to the boundary transport supercurrent which is injected externally. The low-temperature current-phase relations are derived. We consider two models of weak links: a constriction between two conventional superconductors and a plane boundary between two differently orientated d-wave superconductors. We show that for some relation between $\phi $ and $v_{s}$ quasiparticles create the current along the boundary which flows in the direction opposite to the transport supercurrent.

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