Kondo ffect in the presence of magnetic impurities

H. B. Heersche; Z. Deâ Groot; J. A. Folk; L. P. Kouwenhoven; H. S.J. Vané Der Zant; A. A. Houck; J. Labaziewicz; I. L. Chuang

doi:10.1103/PhysRevLett.96.017205

Kondo ffect in the presence of magnetic impurities

H. B. Heersche, Z. Deâ Groot, J. A. Folk, L. P. Kouwenhoven, H. S.J. Vané Der Zant, A. A. Houck, J. Labaziewicz, I. L. Chuang

Research output: Contribution to journal › Article › peer-review

109 Scopus citations

Abstract

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.

Original language	English (US)
Article number	017205
Journal	Physical review letters
Volume	96
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.96.017205
State	Published - Jan 13 2006

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1103/PhysRevLett.96.017205

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abstract = "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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AU - Heersche, H. B.

AU - Deâ Groot, Z.

AU - Folk, J. A.

AU - Kouwenhoven, L. P.

AU - Vané Der Zant, H. S.J.

AU - Houck, A. A.

AU - Labaziewicz, J.

AU - Chuang, I. L.

PY - 2006/1/13

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AB - 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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