The 1/3-shot noise suppression in diffusive nanowires

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.

10 figures

References in corpus (2)

• Universality of the 1/3 shot-noise suppression factor in nondegenerate diffusive conductors
• Universality of Shot-Noise in Multiterminal Diffusive Conductors

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