Tuning the Kondo Effect with a Mechanically Controllable Break Junction
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.
- Publication:
-
Physical Review Letters
- Pub Date:
- July 2007
- DOI:
- 10.1103/PhysRevLett.99.026601
- arXiv:
- arXiv:cond-mat/0610555
- Bibcode:
- 2007PhRvL..99b6601P
- Keywords:
-
- 72.15.Qm;
- 72.80.Rj;
- 73.63.-b;
- Scattering mechanisms and Kondo effect;
- Fullerenes and related materials;
- Electronic transport in nanoscale materials and structures;
- Condensed Matter - Mesoscopic Systems and Quantum Hall Effect
- E-Print:
- 4 pages with 4 figures