Positive Current Correlations Associated with Super-Poissonian Shot Noise

Yuanzhen Chen and Richard A. Webb
Phys. Rev. Lett. 97, 066604 – Published 11 August 2006

Abstract

We report on shot noise cross spectrum measurements in a beam splitter configuration. Electrons tunneling through potential barriers are incident on a beam splitter and scattered into two separate channels. Such a partition process introduces correlations between the fluctuations of the two currents. Our work has confirmed that the generally expected negative correlations resulted from sub-Poissonian electron sources. More interestingly, positive cross correlations associated with barriers exhibiting super-Poissonian shot noise have also been observed. We have found that both positive and negative correlations can be related to the noise properties of the electron source.

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  • Received 20 February 2006

DOI:https://doi.org/10.1103/PhysRevLett.97.066604

©2006 American Physical Society

Authors & Affiliations

Yuanzhen Chen* and Richard A. Webb

  • Department of Physics and USC NanoCenter, University of South Carolina, Columbia, South Carolina 29208, USA

  • *Now at Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA.

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Vol. 97, Iss. 6 — 11 August 2006

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