IDEAS home Printed from https://ideas.repec.org/a/nat/nature/v405y2000i6782d10.1038_35011012.html
   My bibliography  Save this article

Detection of doubled shot noise in short normal-metal/ superconductor junctions

Author

Listed:
  • X. Jehl

    (DRFMC-SPSMS, CEA-Grenoble)

  • M. Sanquer

    (DRFMC-SPSMS, CEA-Grenoble)

  • R. Calemczuk

    (DRFMC-SPSMS, CEA-Grenoble)

  • D. Mailly

    (Laboratoire de Microstructures et de Microélectronique, CNRS-LMM)

Abstract

Shot noise refers to the fluctuations in electrical current through a device arising from the discrete nature of the charge-carrying particles. Recent experiments have exploited the fact that the shot noise is proportional to the charge of the carriers to establish fractional quantization of quasiparticles in the fractional quantum Hall effect1,2. By a similar argument, it is expected that when a superconducting reservoir emits Cooper pairs, (which have a charge twice that of an electron) into a short normal-metal wire, the shot noise should be double that obtained for a normal-metal reservoir3,4. Although the charge of Cooper pairs has been well established by flux quantization and tunnel experiments5, doubling of their shot noise has not yet been observed. Here we report a shot-noise experiment using a short diffusive normal-metal superconductor contact, in which we confirm the predicted noise behaviour for double charges. The measurements, taken over a large range of bias current, establish that phase coherence is not required to observe the effect.

Suggested Citation

  • X. Jehl & M. Sanquer & R. Calemczuk & D. Mailly, 2000. "Detection of doubled shot noise in short normal-metal/ superconductor junctions," Nature, Nature, vol. 405(6782), pages 50-53, May.
    • Handle: RePEc:nat:nature:v:405:y:2000:i:6782:d:10.1038_35011012
    DOI: 10.1038/35011012
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/35011012
    File Function: Abstract
    Download Restriction: Access to the full text of the articles in this series is restricted.
    File URL: https://libkey.io/10.1038/35011012?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:nat:nature:v:405:y:2000:i:6782:d:10.1038_35011012. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.nature.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.