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

Abstract

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.

arXiv comment4 pages, 3 figures

References in corpus (8)

• Kondo Physics in a Single Electron Transistor
• A Tunable Kondo Effect in Quantum Dots
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Cited by in corpus (2)

• Quantifying the leading role of the surface state in the Kondo effect of Co/Ag(111)
• A new view on the origin of zero-bias anomalies of Co atoms atop noble metal surfaces