The Kondo Effect in the Unitary Limit
Mesoscale and Nanoscale Physics
2009-10-31 v1 Strongly Correlated Electrons
Abstract
We observe a strong Kondo effect in a semiconductor quantum dot when a small magnetic field is applied. The Coulomb blockade for electron tunneling is overcome completely by the Kondo effect and the conductance reaches the unitary-limit value. We compare the experimental Kondo temperature with the theoretical predictions for the spin-1/2 Anderson impurity model. Excellent agreement is found throughout the Kondo regime. Phase coherence is preserved when a Kondo quantum dot is included in one of the arms of an Aharonov-Bohm ring structure and the phase behavior differs from previous results on a non-Kondo dot.
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Cite
@article{arxiv.cond-mat/0009405,
title = {The Kondo Effect in the Unitary Limit},
author = {W. G. van der Wiel and S. De Franceschi and T. Fujisawa and J. M. Elzerman and S. Tarucha and L. P. Kouwenhoven},
journal= {arXiv preprint arXiv:cond-mat/0009405},
year = {2009}
}
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10 pages