Structure and conductance histogram of atomic-sized Au contacts

Details Structure and conductance histogram of atomic-sized Au contacts Structure and conductance histogram of atomic-sized Au contacts

2004-06-11

arxiv.org/abs/cond-mat/0406281v2

Phys. Rev. B 72, 075435 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 10 figures, version to be published in Phys. Rev. B. The paper has been thoroughly revised and several figures have

Scientific paper

10.1103/PhysRevB.72.075435

Many experiments have shown that the conductance histograms of metallic atomic-sized contacts exhibit a peak structure, which is characteristic of the corresponding material. The origin of these peaks still remains as an open problem. In order to shed some light on this issue, we present a theoretical analysis of the conductance histograms of Au atomic contacts. We have combined classical molecular dynamics simulations of the breaking of nanocontacts with conductance calculations based on a tight-binding model. This combination gives us access to crucial information such as contact geometries, forces, minimum cross-section, total conductance and transmission coefficients of the individual conduction channels. The ensemble of our results suggests that the low temperature Au conductance histograms are a consequence of a subtle interplay between mechanical and electrical properties of these nanocontacts. At variance with other suggestions in the literature, our results indicate that the peaks in the Au conductance histograms are not a simple consequence of conductance quantization or the existence of exceptionally stable radii. We show that the main peak in the histogram close to one quantum of conductance is due to the formation of single-atom contacts and chains of gold atoms. Moreover, we present a detailed comparison with experimental results on Au atomic contacts where the individual channel transmissions have been determined.

Affiliated with

Also associated with

No associations

Rating

Structure and conductance histogram of atomic-sized Au contacts 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 Structure and conductance histogram of atomic-sized Au contacts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Structure and conductance histogram of atomic-sized Au contacts will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-106136