Kondo Resonances and Anomalous Gate Dependence in the Electrical Conductivity of Single-Molecule Transistors

L. H. Yu, Z. K. Keane, J. W. Ciszek, L. Cheng, J. M. Tour, T. Baruah, M. R. Pederson, and D. Natelson
Phys. Rev. Lett. 95, 256803 – Published 14 December 2005
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Abstract

We report Kondo resonances in the conduction of single-molecule transistors based on transition metal coordination complexes. We find Kondo temperatures in excess of 50 K, comparable to those in purely metallic systems. The observed gate dependence of the Kondo temperature is inconsistent with observations in semiconductor quantum dots and a simple single-dot-level model. We discuss possible explanations of this effect, in light of electronic structure calculations.

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  • Received 27 May 2005

DOI:https://doi.org/10.1103/PhysRevLett.95.256803

©2005 American Physical Society

Authors & Affiliations

L. H. Yu1, Z. K. Keane1, J. W. Ciszek2, L. Cheng2, J. M. Tour2, T. Baruah4,5, M. R. Pederson4, and D. Natelson1,3

  • 1Department of Physics and Astronomy, Rice University, 6100 Main Street, Houston, Texas 77005, USA
  • 2Department of Chemistry and Center for Nanoscale Science and Technology, Rice University, 6100 Main Street, Houston, Texas 77005, USA
  • 3Department of Electrical and Computer Engineering, Rice University, 6100 Main Street, Houston, Texas 77005, USA
  • 4Center for Computational Materials Science, Code 6390-Naval Research Laboratory, Washington, DC 20375-5435, USA
  • 5Department of Physics, SUNY, Stony Brook, New York 11794, USA

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Issue

Vol. 95, Iss. 25 — 16 December 2005

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