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Multiple-Charge-Quanta Shot Noise in Superconducting Atomic Contacts

R. Cron, M. F. Goffman, D. Esteve, and C. Urbina
Phys. Rev. Lett. 86, 4104 – Published 30 April 2001
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Abstract

We have measured shot noise in aluminum atomic point contacts containing a small number of conduction channels of known transmissions. In the normal state, we find that the noise power is reduced from its Poissonian value and reaches the partition limit, as calculated from the transmissions. In the superconducting state, the noise reveals the large effective charge associated with each elementary transfer process, in excellent agreement with the predictions of the quantum theory of multiple Andreev reflections.

  • Received 21 December 2000

DOI:https://doi.org/10.1103/PhysRevLett.86.4104

©2001 American Physical Society

Authors & Affiliations

R. Cron, M. F. Goffman, D. Esteve, and C. Urbina

  • Service de Physique de l'Etat Condensé, Commissariat à l'Energie Atomique, Saclay, F-91191 Gif-sur-Yvette Cedex, France

See Also

Electric Current in Big Chunks

Phys. Rev. Focus 7, 20 (2001)

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Issue

Vol. 86, Iss. 18 — 30 April 2001

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