Quantum suppression of shot noise in atom-size metallic contacts

Details Quantum suppression of shot noise in atom-size metallic contacts Quantum suppression of shot noise in atom-size metallic contacts

1998-10-21

arxiv.org/abs/cond-mat/9810276v2

Phys. Rev. Lett. 82 (1999) 1526

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Fig. 2 replaced, small errors corrected

Scientific paper

10.1103/PhysRevLett.82.1526

The transmission of conductance modes in atom-size gold contacts is investigated by simultaneously measuring conductance and shot noise. The results give unambiguous evidence that the current in the smallest gold contacts is mostly carried by nearly fully transmitted modes. In particular, for a single-atom contact the contribution of additional modes is only a few percent. In contrast, the trivalent metal aluminum does not show this property.

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