Phys. Rev. Lett. 99, 026601 (2007) [4 pages]Tuning the Kondo Effect with a Mechanically Controllable Break JunctionReceived 18 October 2006; published 11 July 2007 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. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.026601
DOI:
10.1103/PhysRevLett.99.026601
PACS:
72.15.Qm, 72.80.Rj, 73.63.−b
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