Kondo effect of Co adatoms on Ag monolayers on noble metal surfaces

Details Kondo effect of Co adatoms on Ag monolayers on noble metal surfaces Kondo effect of Co adatoms on Ag monolayers on noble metal surfaces

2004-09-15

arxiv.org/abs/cond-mat/0409390v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1143/JJAP.44.5328

The Kondo temperature $T_K$ of single Co adatoms on monolayers of Ag on Cu and Au(111) is determined using Scanning Tunneling Spectroscopy. $T_K$ of Co on a single monolayer of Ag on either substrate is essentially the same as that of Co on a homogenous Ag(111) crystal. This gives strong evidence that the interaction of surface Kondo impurities with the substrate is very local in nature. By comparing $T_K$ found for Co on Cu, Ag, and Au (111)-surfaces we show that the energy scale of the many-electron Kondo state is insensitive to the properties of surface states and to the energetic position of the projected bulk band edges.

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