Kondo Decoherence: Finding the Right Spin Model for Iron Impurities in Gold and Silver
Kondo Decoherence: Finding the Right Spin Model for Iron Impurities in Gold and Silver
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DOI：
10.1103/physrevlett.102.056802
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发表时间：
2009-02-06
影响因子：
8.6
通讯作者：
Baeuerle, C.
中科院分区：
文献类型：
--
作者：
Costi, T. A.;Bergqvist, L.;Baeuerle, C.
We exploit the decoherence of electrons due to magnetic impurities, studied via weak localization, to resolve a long-standing question concerning the classic Kondo systems of Fe impurities in the noble metals gold and silver: which Kondo-type model yields a realistic description of the relevant multiple bands, spin, and orbital degrees of freedom? Previous studies suggest a fully screened spin S Kondo model, but the value of S remained ambiguous. We perform density functional theory calculations that suggest S = 3/2. We also compare previous and new measurements of both the resistivity and decoherence rate in quasi-one-dimensional wires to numerical renormalization group predictions for S = 1/2, 1, and 3/2, finding excellent agreement for S = 3/2.
