Tuning the Kondo Effect with a Mechanically Controllable Break Junction

J. J. Parks, A. R. Champagne, G. R. Hutchison, S. Flores-Torres, H. D. Abruña, and D. C. Ralph
Phys. Rev. Lett. 99, 026601 – Published 11 July 2007

Abstract

We study electron transport through C60 molecules in the Kondo regime using a mechanically controllable break junction. By varying the electrode spacing, we are able to change both the width and the height of the Kondo resonance, indicating modification of the Kondo temperature and the relative strength of coupling to the two electrodes. The linear conductance as a function of T/TK agrees with the scaling function expected for the spin-1/2 Kondo problem. We are also able to tune finite-bias Kondo features which appear at the energy of the first C60 intracage vibrational mode.

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  • Received 18 October 2006

DOI:https://doi.org/10.1103/PhysRevLett.99.026601

©2007 American Physical Society

Authors & Affiliations

J. J. Parks1, A. R. Champagne1, G. R. Hutchison2, S. Flores-Torres2, H. D. Abruña2, and D. C. Ralph1

  • 1Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
  • 2Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, USA

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Issue

Vol. 99, Iss. 2 — 13 July 2007

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