Conductance of Atomic-Sized Lead Contacts in an Electrochemical Environment

Details Conductance of Atomic-Sized Lead Contacts in an Electrochemical Environment Conductance of Atomic-Sized Lead Contacts in an Electrochemical Environment

2010-02-23

arxiv.org/abs/1002.4291v1

Phys. Rev. B 82, 075417 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevB.82.075417

Atomic-sized lead (Pb) contacts are deposited and dissolved in an electrochemical environment, and their transport properties are measured. Due to the electrochemical fabrication process, we obtain mechanically unstrained contacts and conductance histograms with sharply resolved, individual peaks. Charge transport calculations based on density functional theory (DFT) for various ideal Pb contact geometries are in good agreement with the experimental results. Depending on the atomic configuration, single-atom-wide contacts of one and the same metal yield very different conductance values.

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