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Kondo effect in the presence of magnetic impurities



Kondo effect in the presence of magnetic impurities



Physical Review Letters 96(1): 017205



We measure transport through gold grain quantum dots fabricated using electromigration, with magnetic impurities in the leads. A Kondo interaction is observed between dot and leads, but the presence of magnetic impurities results in a gate-dependent zero-bias conductance peak that is split due to a RKKY interaction between the spin of the dot and the static spins of the impurities. A magnetic field restores the single Kondo peak in the case of an antiferromagnetic RKKY interaction. This system provides a new platform to study Kondo and RKKY interactions in metals at the level of a single spin.

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Accession: 049440899

Download citation: RISBibTeXText

PMID: 16486511

DOI: 10.1103/physrevlett.96.017205


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