Conductance fluctuations as a tool for investigating the quantum modes in atomic size metallic contacts

Abstract

Recently it has been observed that the conductance fluctuations of atomic size gold contacts are suppressed when the conductance is equal to an integer multiple of the conductance quantum. The fact that these contacts tend to consist exclusively of fully open or closed modes has been argued to be the origin for this suppression. Here, the experiments have been extended to a wide range of metallic elements with different chemical valence and they provide new information about the relation between the mode composition and statistically preferred conductance values observed in conductance histograms.

14 pages; submitted to Phys. Rev. B

References in corpus (6)

• Formation and manipulation of a metallic wire of single gold atoms
• Microscopic origin of the conducting channels in metallic atomic-size contacts
• Quantum suppression of shot noise in atom-size metallic contacts
• Evidence for saturation of channel transmission from conductance fluctuations in atomic-size point contacts
• Thermopower of atomic-size metallic contacts
• Thermopower of Single-Channel Disordered and Chaotic Conductors

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