Universality of the 1/3 shot-noise suppression factor in nondegenerate diffusive conductors

Details Universality of the 1/3 shot-noise suppression factor in nondegenerate diffusive conductors Universality of the 1/3 shot-noise suppression factor in nondegenerate diffusive conductors

1998-03-30

arxiv.org/abs/cond-mat/9803372v1

Phys. Rev. Lett. 80 (1998) 2901

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

RevTex, 4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.80.2901

Shot-noise suppression is investigated in nondegenerate diffusive conductors by means of an ensemble Monte Carlo simulator. The universal 1/3 suppression value is obtained when transport occurs under elastic collision regime provided the following conditions are satisfied: (i) The applied voltage is much larger than the thermal value; (ii) the length of the device is much longer than both the elastic mean free path and the Debye length. By fully suppressing carrier-number fluctuations, long range Coulomb interaction is essential to obtain the 1/3 value in the low-frequency limit.

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