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Shot noise in diffusive conductors: A quantitative analysis of electron-phonon interaction effects

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

Using the 'drift-diffusion-Langevin' equation, we have quantitatively analyzed the effects of electron energy relaxation via their interaction with phonons, generally in presence of electron-electron interaction, on shot noise in diffusive conductors. We have found that the noise power $ S_I(ω)$ (both at low and high observation frequencies $ω$) drops to half of its 'mesoscopic' value only at $β\gtrsim 100,$ where $β$ is the ratio of the sample length $L$ to the energy relaxation length $l_{% {\rm ph}}$ (the latter may be much larger then the dephasing length). It means in particular that at low temperatures the shot noise may be substantial even when $L\sim 10^{-2}$ -- $10^{-1}$ cm, and the conductor is 'macroscopic' in any other respect.

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Y. Naveh, D. V. Averin, K. K. Likharev. 1998-03-27. Shot noise in diffusive conductors: A quantitative analysis of electron-phonon interaction effects. https://doi.org/10.1103/physrevb.58.15371

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