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arXiv · 1601.02469

Single Quantum Level Electron Turnstile

D. M. T. van Zanten·D. M. Basko·I. M. Khaymovich·J. P. Pekola·H. Courtois·C. B. Winkelmann
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Abstract

We report on the realization of a single-electron source, where current is transported through a single-level quantum dot (Q), tunnel-coupled to two superconducting leads (S). When driven with an ac gate voltage, the experiment demonstrates electron turnstile operation. Compared to the more conventional superconductor - normal metal - superconductor turnstile, our SQS device presents a number of novel properties, including higher immunity to the unavoidable presence of non-equilibrium quasiparticles in superconducting leads. In addition, we demonstrate its ability to deliver electrons with a very narrow energy distribution.

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D. M. T. van Zanten, D. M. Basko, I. M. Khaymovich, J. P. Pekola, H. Courtois, C. B. Winkelmann. 2016-01-11. Single Quantum Level Electron Turnstile. https://doi.org/10.1103/physrevlett.116.166801

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