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Doubled Shot Noise In Disordered Normal-Metal-Superconductor Junctions

M. J. M. de Jong·C. W. J. Beenakker
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Abstract

The low-frequency shot-noise power of a normal-metal-superconductor junction is studied for arbitrary normal region. Through a scattering approach, a formula is derived which expresses the shot-noise power in terms of the transmission eigenvalues of the normal region. The noise power divided by the current is enhanced by a factor two with respect to its normal-state value, due to Cooper-pair transport in the superconductor. For a disordered normal region, it is still smaller than the Poisson noise, as a consequence of noiseless open scattering channels.

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M. J. M. de Jong, C. W. J. Beenakker. 1994-03-14. Doubled Shot Noise In Disordered Normal-Metal-Superconductor Junctions. https://doi.org/10.1103/physrevb.49.16070

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