Kondo resonances and anomalous gate dependence of electronic conduction in single-molecule transistors

ORAL

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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Authors

  • Douglas Natelson

    • Rice University Dept. of Physics and Astronomy
    • Dept. of Physics and Astronomy, Rice University
    • Rice University
    • Department of Physics and Astronomy, Rice University

  • Lam Yu

  • Zachary Keane

    • Rice University, Dept. of Physics and Astronomy

  • Jacob Ciszek

    • Department of Chemistry, Rice University

  • L. Cheng

  • James Tour

    • Rice University Dept. of Chemistry
    • Rice University, Dept. of Chemistry
    • Department of Chemistry, Rice University

  • Tunna Baruah

    • University of Texas at El Paso
    • University of Texas El Paso

  • M.R. Pederson

    • Naval Research Laboratory