Real-time observation of discrete Andreev tunneling events

V.F. Maisi (Corresponding Author), O.-P. Saira, Yu.A. Pashkin, J.S. Tsai, D.V. Averin, J.P. Pekola

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

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.
Original languageEnglish
Article number217003
Number of pages4
JournalPhysical Review Letters
Volume106
Issue number21
DOIs
Publication statusPublished - 2011
MoE publication typeA1 Journal article-refereed

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single electron transistors
electron transitions
tunnel junctions
ballistics
tunnels
counting
direct current
metals
electrons

Cite this

Maisi, V. F., Saira, O-P., Pashkin, Y. A., Tsai, J. S., Averin, D. V., & Pekola, J. P. (2011). Real-time observation of discrete Andreev tunneling events. Physical Review Letters, 106(21), [217003]. https://doi.org/10.1103/PhysRevLett.106.217003
Maisi, V.F. ; Saira, O.-P. ; Pashkin, Yu.A. ; Tsai, J.S. ; Averin, D.V. ; Pekola, J.P. / Real-time observation of discrete Andreev tunneling events. In: Physical Review Letters. 2011 ; Vol. 106, No. 21.
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Maisi, VF, Saira, O-P, Pashkin, YA, Tsai, JS, Averin, DV & Pekola, JP 2011, 'Real-time observation of discrete Andreev tunneling events', Physical Review Letters, vol. 106, no. 21, 217003. https://doi.org/10.1103/PhysRevLett.106.217003

Real-time observation of discrete Andreev tunneling events. / Maisi, V.F. (Corresponding Author); Saira, O.-P.; Pashkin, Yu.A.; Tsai, J.S.; Averin, D.V.; Pekola, J.P.

In: Physical Review Letters, Vol. 106, No. 21, 217003, 2011.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Maisi, V.F.

AU - Saira, O.-P.

AU - Pashkin, Yu.A.

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AU - Averin, D.V.

AU - Pekola, J.P.

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AB - 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.

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JO - Physical Review Letters

JF - Physical Review Letters

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Maisi VF, Saira O-P, Pashkin YA, Tsai JS, Averin DV, Pekola JP. Real-time observation of discrete Andreev tunneling events. Physical Review Letters. 2011;106(21). 217003. https://doi.org/10.1103/PhysRevLett.106.217003