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A Tunable Kondo Effect in Quantum Dots

Sara M. Cronenwett·Tjerk H. Oosterkamp·Leo P. Kouwenhoven
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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.

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Sara M. Cronenwett, Tjerk H. Oosterkamp, Leo P. Kouwenhoven. 1998-04-20. A Tunable Kondo Effect in Quantum Dots. https://doi.org/10.1126/science.281.5376.540

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