Comment on ``Quantum Suppression of Shot Noise in Atom-Size Metallic Contacts''

Details Comment on ``Quantum Suppression of Shot Noise in Atom-Size Metallic Contacts'' Comment on ``Quantum Suppression of Shot Noise in Atom-Size Metallic Contacts''

1999-07-27

arxiv.org/abs/cond-mat/9907425v1

Phys. Rev. Lett. 83, 3342 (1999)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

1 page, 1 figure, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.83.3342

In a recent letter (Phys.Rev.Lett. 82, 1526 (1999)), van den Brom and van Ruitenbeek found a pronounced suppression of the shot noise in atom-size gold contacts with conductances near integer multiples of $G_0=2e^2/h$, revealing unambiguously the quantized nature of the electronic transport. However, the ad hoc model they introduced to describe the contribution of partially-open conductance channels to the shot noise is unable to fit either the maxima or minima of their shot noise data. Here we point out that a model of quantum-confined electrons with disorder quantitatively reproduces their measurements.

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