Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2006-08-23
J. Phys. Conf. Ser. 61, 312-316 (2007)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
5 pages, 3 figures, Contribution to ICN+T2006, Basel, Switzerland, July-August 2006
Scientific paper
10.1088/1742-6596/61/1/063
We present series of first-principles calculations for both pure and hydrogen contaminated gold wire systems in order to investigate how such impurities can be detected. We show how a single H atom or a single H2 molecule in an atomic gold wire will affect forces and Au-Au atom distances under elongation. We further determine the corresponding evolution of the low-bias conductance as well as the inelastic contributions from vibrations. Our results indicate that the conductance of gold wires is only slightly reduced from the conductance quantum G0=2e^2/h by the presence of a single hydrogen impurity, hence making it difficult to use the conductance itself to distinguish between various configurations. On the other hand, our calculations of the inelastic signals predict significant differences between pure and hydrogen contaminated wires, and, importantly, between atomic and molecular forms of the impurity. A detailed characterization of gold wires with a hydrogen impurity should therefore be possible from the strain dependence of the inelastic signals in the conductance.
Brandbyge Mads
Frederiksen Thomas
Paulsson Magnus
No associations
LandOfFree
Inelastic fingerprints of hydrogen contamination in atomic gold wire systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Inelastic fingerprints of hydrogen contamination in atomic gold wire systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inelastic fingerprints of hydrogen contamination in atomic gold wire systems will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-109726