Electron-Vibration Interaction in Single-Molecule Junctions: From Contact to Tunneling Regimes
Abstract
Point contact spectroscopy on a H2O molecule bridging Pt electrodes reveals a clear crossover between enhancement and reduction of the conductance due to electron-vibration interaction. As single-channel models predict such a crossover at a transmission probability of τ=0.5, we used shot noise measurements to analyze the transmission and observed at least two channels across the junction where the dominant channel has a τ=0.51±0.01 transmission probability at the crossover conductance, which is consistent with the predictions for single-channel models.
- Publication:
-
Physical Review Letters
- Pub Date:
- May 2008
- DOI:
- arXiv:
- arXiv:0801.3031
- Bibcode:
- 2008PhRvL.100s6804T
- Keywords:
-
- 73.63.Rt;
- 72.10.Di;
- 73.40.-c;
- 73.63.Nm;
- Nanoscale contacts;
- Scattering by phonons magnons and other nonlocalized excitations;
- Electronic transport in interface structures;
- Quantum wires;
- Condensed Matter - Mesoscopic Systems and Quantum Hall Effect;
- Condensed Matter - Other
- E-Print:
- 4 pages, 1 table, 4 figures