Manipulation and Generation of Supercurrent in Out-of-Equilibrium Josephson Tunnel Nanojunctions

Details Manipulation and Generation of Supercurrent in Out-of-Equilibrium Josephson Tunnel Nanojunctions Manipulation and Generation of Supercurrent in Out-of-Equilibrium Josephson Tunnel Nanojunctions

2008-04-16

arxiv.org/abs/0804.2649v2

Phys. Rev. Lett. 101, 077004 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 colour figures, published version

Scientific paper

10.1103/PhysRevLett.101.077004

We demonstrate experimentally manipulation of supercurrent in Al-AlO_x-Ti Josephson tunnel junctions by injecting quasiparticles in a Ti island from two additional tunnel-coupled Al superconducting reservoirs. Both supercurrent enhancement and quenching with respect to equilibrium are achieved. We demonstrate cooling of the Ti line by quasiparticle injection from the normal state deep into the superconducting phase. A model based on heat transport and non-monotonic current-voltage characteristic of a Josephson junction satisfactorily accounts for our findings.

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