Kondo decoherence: finding the right spin model for iron impurities in gold and silver

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dc.creatorCosti, T. A.
dc.creatorBergqvist, L.
dc.creatorWeichselbaum, A.
dc.creatorvon Delft, J.
dc.creatorMicklitz, T.
dc.creatorRosch, A.
dc.creatorMavropoulos, P.
dc.creatorDederichs, P. H.
dc.creatorMallet, F.
dc.creatorSaminadayar, L.
dc.creatorBauerle, C.
dc.date2008-10-09
dc.date2009-02-03
dc.date.accessioned2026-07-07T12:36:45Z
dc.date.available2026-07-07T12:36:45Z
dc.descriptionWe exploit the decoherence of electrons due to magnetic impurities, studied via weak localization, to resolve a longstanding 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 1-dimensional wires to numerical renormalization group predictions for $S=1/2,1$ and 3/2, finding excellent agreement for $S=3/2$.
dc.description4 pages, 4 figures, shortened for PRL
dc.identifierhttps://arxiv.org/abs/0810.1771
dc.identifierhttp://arxiv.org/abs/0810.1771
dc.identifierPhys. Rev. Lett. 102, 056802 (2009)
dc.identifierdoi:10.1103/PhysRevLett.102.056802
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/218199
dc.subjectStrongly Correlated Electrons
dc.subjectMesoscale and Nanoscale Physics
dc.titleKondo decoherence: finding the right spin model for iron impurities in gold and silver
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