Kinetic theory of shot noise in nondegenerate diffusive conductors

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Publication Type Journal Article
School or College College of Science
Department Physics
Creator Mishchenko, Eugene
Other Author Schomerus, H.; Beenakker, C. W. J.
Title Kinetic theory of shot noise in nondegenerate diffusive conductors
Date 1999-08
Description We investigate current fluctuations in nondegenerate semiconductors, on length scales intermediate between the elastic and inelastic mean free paths. We present an exact solution of the nonlinear kinetic equations in the regime of space-charge limited conduction, without resorting to the drift approximation of previous work. By including the effects of a finite voltage and carrier density in the contact region, a quantitative agreement is obtained with Monte Carlo simulations by Gonzalez et al., for a model of an energy-independent elastic scattering rate. The shot-noise power P is suppressed below the Poisson value PPoisson52eI (at mean current I) by the Coulomb repulsion of the carriers. The exact suppression factor is close to 1/3 in a three-dimensional system, in agreement with the simulations and with the drift approximation. Including an energy dependence of the scattering rate has a small effect on the suppression factor for the case of short-range scattering by uncharged impurities or quasielastic scattering by acoustic phonons. Long-range scattering by charged impurities remains an open problem.
Type Text
Publisher American Physical Society
Journal Title Physical Review B
Volume 60
Issue 8
First Page 5839
Last Page 5850
DOI 10.1103/PhysRevB.60.5839
citatation_issn 0163-1829
Subject Shot noise; Conductors; Boltzmann equation
Subject LCSH Kinetic theory of gases; Diffusion; Transport theory
Language eng
Bibliographic Citation Schomerus, H., Mishchenko, E., & Beenakker, C. W. J. (1999). Kinetic theory of shot noise in nondegenerate diffusive conductors. Physical Review B - Condensed Matter and Materials Physics, 60(8), 5839-50.
Rights Management (c) American Physical Society
Format Medium application/pdf
Format Extent 175,936 bytes
Identifier ir-main,11817
ARK ark:/87278/s605807d
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2012-06-13
ID 704136
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