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Atomic-Scale Control of Electron Transport through Single Molecules

Y. F. Wang, J. Kröger, R. Berndt, H. Vázquez, M. Brandbyge, and M. Paulsson
Phys. Rev. Lett. 104, 176802 – Published 27 April 2010
Physics logo See Synopsis: Tuning conductance
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Abstract

Tin-phthalocyanine molecules adsorbed on Ag(111) were contacted with the tip of a cryogenic scanning tunneling microscope. Orders-of-magnitude variations of the single-molecule junction conductance were achieved by controllably dehydrogenating the molecule and by modifying the atomic structure of the surface electrode. Nonequilibrium Green’s function calculations reproduce the trend of the conductance and visualize the current flow through the junction, which is guided through molecule-electrode chemical bonds.

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  • Received 6 February 2010

DOI:https://doi.org/10.1103/PhysRevLett.104.176802

©2010 American Physical Society

Synopsis

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Tuning conductance

Published 29 April 2010

A single-molecule junction on a silver surface exhibits orders-of-magnitude variation in conductance.

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Authors & Affiliations

Y. F. Wang1, J. Kröger1,*, R. Berndt1, H. Vázquez2, M. Brandbyge2, and M. Paulsson3

  • 1Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany
  • 2DTU Nanotech - Department of Micro and Nanotechnology, NanoDTU, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
  • 3School of Pure and Applied Natural Science, University of Kalmar, SE-39182 Kalmar, Sweden

  • *kroeger@physik.uni-kiel.de

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Issue

Vol. 104, Iss. 17 — 30 April 2010

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