Real-time observation of discrete Andreev tunneling events

Maisi, V. F. and Saira, O. -P. and Pashkin, Yuri and Tsai, J. S. and Averin, D. V. and Pekola, J. P. (2011) Real-time observation of discrete Andreev tunneling events. Physical review letters, 106 (21): 217003. -. ISSN 0031-9007

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We provide a direct proof of two-electron Andreev transitions in a superconductor-normal-metal tunnel junction by detecting them in a real-time electron counting experiment. Our results are consistent with ballistic Andreev transport with an order of magnitude higher rate than expected for a uniform barrier, suggesting that only part of the interface is effectively contributing to the transport. These findings are quantitatively supported by our direct current measurements in single-electron transistors with similar tunnel barriers.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Additional Information:
© 2011 American Physical Society
Uncontrolled Keywords:
?? physicsphysics and astronomy(all)qc physics ??
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Deposited On:
28 Aug 2012 10:32
Last Modified:
18 Dec 2023 01:18