STM conductance of Kondo impurities on open and structured surfaces

TL;DR

This paper investigates the STM conductance of magnetic Kondo impurities on various surfaces, revealing that bulk electrons primarily drive Kondo screening, with notable confinement effects observed in structured surfaces.

Contribution

It applies Wilson's renormalization group to analyze STM responses, highlighting the dominance of bulk electrons over surface states in Kondo screening, and identifies confinement effects in structured surfaces.

Findings

Fano resonances linked to Kondo effects observed

Confinement effects significant in structured surfaces

Bulk electrons dominate Kondo screening

Abstract

We study the scanning tunneling microscopy response for magnetic atoms on open and structured surfaces using Wilson's renormalization group. We observe Fano resonances associated with Kondo resonances and interference effects. For a magnetic atom in a quantum corral coupled to the confined surface states, and experimentally relevant parameters, we observe a large confinement induced effect not present in the experiments. These results suggest that the Kondo screening is dominated by the bulk electrons rather than the surface ones.