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Effect of screening on shot noise in diffusive mesoscopic conductors

Y. Naveh·D. V. Averin·K. K. Likharev
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Abstract

Shot noise in diffusive mesoscopic conductors, at finite observation frequencies $ω$ (comparable to the reciprocal Thouless time $τ_T^{-1}$), is analyzed with an account of screening. At low frequencies, the well-known result $S_I(ω)=2eI/3$ is recovered. This result is valid at arbitrary $ωτ_T$ for wide conductors longer than the screening length. However, at least for two very different systems, namely, wide and short conductors, and thin conductors over a close ground plane, noise approaches a different fundamental level, $S_I(ω) = eI$, at $ωτ_T\gg 1$.

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Y. Naveh, D. V. Averin, K. K. Likharev. 1998-01-19. Effect of screening on shot noise in diffusive mesoscopic conductors. https://doi.org/10.1103/physrevlett.79.3482

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