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29 March 2024
 
  » arxiv » cond-mat/0009405

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The Kondo Effect in the Unitary Limit
W.G. van der Wiel ; S. De Franceschi ; T. Fujisawa ; J.M. Elzerman ; S. Tarucha ; L.P. Kouwenhoven ;
Date 26 Sep 2000
Journal W.G. van der Wiel et al., Science 289, 2105 (2000)
Subject Mesoscopic Systems and Quantum Hall Effect; Strongly Correlated Electrons | cond-mat.mes-hall cond-mat.str-el
AbstractWe 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.
Source arXiv, cond-mat/0009405
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