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Phys. Rev. B 46, 1889 - 1892 (1992)

Suppression of shot noise in metallic diffusive conductors

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C. W. J. Beenakker
Instituut-Lorentz, University of Leiden, P.O. Box 9506, 2300 RA Leiden, The Netherlands

M. Büttiker
IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598

Rapid Communication Received 3 April 1992

The shot-noise power in a disordered phase-coherent conductor, much longer than the mean free path but much shorter than an inelastic scattering length, is one-third of the classical value of a Poisson process. The reduction below the classical value is a consequence of noiseless open quantum channels. In conductors much longer than an inelasic length, shot noise is further suppressed due to counterbalancing voltage fluctuations which enforce charge neutrality.


©1992 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevB.46.1889
DOI: 10.1103/PhysRevB.46.1889
PACS: 73.50.Td, 72.70.+m, 72.10.Bg, 72.15.Rn

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