Electron-Vibration Interaction in Single-Molecule Junctions: From Contact to Tunneling Regimes

O. Tal, M. Krieger, B. Leerink, and J. M. van Ruitenbeek
Phys. Rev. Lett. 100, 196804 – Published 14 May 2008

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.

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  • Received 20 January 2008

DOI:https://doi.org/10.1103/PhysRevLett.100.196804

©2008 American Physical Society

Authors & Affiliations

O. Tal1, M. Krieger1,2, B. Leerink1, and J. M. van Ruitenbeek1

  • 1Kamerlingh Onnes Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands
  • 2Institute of Applied Physics, University of Erlangen-Nürnberg, Staudtstrasse 7/A3, D-91058 Erlangen, Germany

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Issue

Vol. 100, Iss. 19 — 16 May 2008

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