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On the "anomalous" resurgence of shot noise in long conductors

Mukunda P Das·Frederick Green
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Abstract

There has been renewed interest in the physics of the so-called crossover for current fluctuations in mesoscopic conductors, most recently involving the possibility of its appearance in the passage to the macroscopic limit. Shot noise is normally absent from solid-state conductors in the large, and its anomalous resurgence there has been ascribed to a rich interplay of drift, diffusion, and Coulomb screening. We demonstrate that essentially the same rise in shot noise occurs in a much less complex system: the Boltzmann-Drude-Lorentz model of a macroscopic, uniform gas of strictly noninteracting carriers. We conclude that the "anomalous crossover" is a manifestation of simple kinetics. Poissonian carriers, if driven by a high enough field, cross the sample faster than any scattering time, thus fulfilling Schottky's condition for ideal shot noise.

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Mukunda P Das, Frederick Green. 2000-09-26. On the "anomalous" resurgence of shot noise in long conductors. https://arxiv.org/abs/cond-mat/0005124

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