Phys. Rev. Lett. 82, 2143–2146 (1999)Kondo Box: A Magnetic Impurity in an Ultrasmall Metallic GrainReceived 30 September 1998; published in the issue dated 8 March 1999 We study the Kondo effect generated by a single magnetic impurity embedded in an ultrasmall metallic grain, to be called a “Kondo box.” We find that the Kondo resonance is strongly affected when the mean level spacing in the grain becomes larger than the Kondo temperature, in a way that depends on the parity of the number of electrons on the grain. We show that the single-electron tunneling conductance through such a grain features Kondo-induced Fano-type resonances of measurable size, with an anomalous dependence on temperature and level spacing. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.2143
DOI:
10.1103/PhysRevLett.82.2143
PACS:
72.15.Qm, 71.27.+a, 73.20.Dx, 73.23.Hk
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