A Tunable Kondo Effect in Quantum Dots
Abstract
We demonstrate a tunable Kondo effect realized in small quantum dots. We can switch our dot from a Kondo impurity to a non-Kondo system as the number of electrons on the dot is changed from odd to even. We show that the Kondo temperature can be tuned by means of a gate voltage as a single-particle energy state nears the Fermi energy. Measurements of the temperature and magnetic field dependence of a Coulomb-blockaded dot show good agreement with predictions of both equilibrium and non-equilibrium Kondo effects.
- Publication:
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Science
- Pub Date:
- July 1998
- DOI:
- arXiv:
- arXiv:cond-mat/9804211
- Bibcode:
- 1998Sci...281..540C
- Keywords:
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- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- 8 pages, 4 figures