We report measurements on three-terminal superconductor-semiconductor-superconductor injection devices demonstrating enhancement of the supercurrent by injection from a superconducting injector electrode. Two other electrodes were used to form the detector junction. Applying a small voltage to the injector electrode reduced the maximum supercurrent (the critical current) between the detector electrodes. When the injector voltage was increased further (upto the gap voltage Delta / e), the critical current between the detector electrodes increased and approached a new maximum. This is evidence of enhancement of the supercurrent by non-equilibrium injection into bound supercurrent-carrying Andreev states. The effect persists to temperatures where the equilibrium supercurrent has vanished. (C) 2001 Elsevier Science B.V. All rights reserved.
|Journal||Physica C: Superconductivity and its Applications|
|Publication status||Published - 2001|
Kutchinsky, J., Taboryski, R. J., Sørensen, C. B., Hansen, J. B., & Lindelof, P. E. (2001). Experimental investigation of supercurrent enhancement in S-N-S junctions by non-equilibrium injection into supercurrent-carrying bound Andreev states. Physica C: Superconductivity and its Applications, 352(1-4), 4-10.