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The 1/3-shot noise suppression in diffusive nanowires

M. Henny·S. Oberholzer·C. Strunk·C. Schönenberger
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Abstract

We report low-temperature shot noise measurements of short diffusive Au wires attached to electron reservoirs of varying sizes. The measured noise suppression factor compared to the classical noise value $2e\left| I\right| $ strongly depends on the electric heat conductance of the reservoirs. For small reservoirs injection of hot electrons increases the measured noise and hence the suppression factor. The universal 1/3-suppression factor can only asymptotically be reached for macroscopically large and thick electron reservoirs. A heating model based on the Wiedemann-Franz law is used to explain this effect.

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M. Henny, S. Oberholzer, C. Strunk, C. Schönenberger. 1998-08-04. The 1/3-shot noise suppression in diffusive nanowires. https://doi.org/10.1103/physrevb.59.2871

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