期刊
PHYSICA C
卷 352, 期 1-4, 页码 4-10出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0921-4534(00)01666-X
关键词
three-terminal device; bound andreev states; non-equilibrium superconductivity; S-N-S junction
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.
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