Rights statement: © 2011 American Physical Society
Final published version, 1.33 MB, PDF document
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Real-time observation of discrete Andreev tunneling events
AU - Maisi, V. F.
AU - Saira, O. -P.
AU - Pashkin, Yuri
AU - Tsai, J. S.
AU - Averin, D. V.
AU - Pekola, J. P.
N1 - © 2011 American Physical Society
PY - 2011/5/25
Y1 - 2011/5/25
N2 - 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.
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.
UR - http://www.scopus.com/inward/record.url?scp=79960626430&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.106.217003
DO - 10.1103/PhysRevLett.106.217003
M3 - Journal article
VL - 106
SP - -
JO - Physical review letters
JF - Physical review letters
SN - 0031-9007
IS - 21
M1 - 217003
ER -