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Letter

Nature Physics 5, 208–212 (1 March 2009) | doi:10.1038/nphys1186

Noisy Kondo impurities

T. Delattre , C. Feuillet-Palma , L. G. Herrmann , P. Morfin , J.-M. Berroir , G. F|[egrave]|ve , B. Pla|[ccedil]|ais , D. C. Glattli , M.-S. Choi , C. Mora & T. Kontos

In the original discussion of the Kondo effect, the increase of the resistance in an alloy such as Cu0.998Fe0.002 at low temperature was explained by the antiferromagnetic coupling between a magnetic impurity and the spin of the host|[rsquo]|s conduction electrons. This coupling has since emerged as a very generic property of localized electronic states coupled to a continuum.