Quantifying the leading role of the surface state in the Kondo effect of Co/Ag(111)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F18%3A73591357" target="_blank" >RIV/61989592:15310/18:73591357 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1103/PhysRevB.97.235442" target="_blank" >http://dx.doi.org/10.1103/PhysRevB.97.235442</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.97.235442" target="_blank" >10.1103/PhysRevB.97.235442</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Quantifying the leading role of the surface state in the Kondo effect of Co/Ag(111)

Popis výsledku v původním jazyce

Using a combination of scanning tunneling spectroscopy and atomic lateral manipulation, we obtained a systematic variation of the Kondo temperature T-K of Co atoms on Ag(111) as a function of the surface-state contribution to the total density of states at the atom adsorption site rho(s) . By sampling the T-K of a Co atom on positions where rho(s) was spatially resolved beforehand, we obtain a nearly linear relationship between the magnitudes. We interpret the data on the basis of an Anderson model including orbital and spin degrees of freedom [SU(4)] in good agreement with the experimental findings. The fact that the onset of the surface band is near the Fermi level is crucial to finding the observed linear behavior. In light of this model, the quantitative analysis of the experimental data evidences that at least a quarter of the coupling of Co impurities with extended states takes place through the hybridization to surface states. This result is of fundamental relevance in the understanding of Kondo screening of magnetic impurities on noble-metal surfaces, where bulk and surface electronic states coexist.

Název v anglickém jazyce

Quantifying the leading role of the surface state in the Kondo effect of Co/Ag(111)

Popis výsledku anglicky

Using a combination of scanning tunneling spectroscopy and atomic lateral manipulation, we obtained a systematic variation of the Kondo temperature T-K of Co atoms on Ag(111) as a function of the surface-state contribution to the total density of states at the atom adsorption site rho(s) . By sampling the T-K of a Co atom on positions where rho(s) was spatially resolved beforehand, we obtain a nearly linear relationship between the magnitudes. We interpret the data on the basis of an Anderson model including orbital and spin degrees of freedom [SU(4)] in good agreement with the experimental findings. The fact that the onset of the surface band is near the Fermi level is crucial to finding the observed linear behavior. In light of this model, the quantitative analysis of the experimental data evidences that at least a quarter of the coupling of Co impurities with extended states takes place through the hybridization to surface states. This result is of fundamental relevance in the understanding of Kondo screening of magnetic impurities on noble-metal surfaces, where bulk and surface electronic states coexist.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

PHYSICAL REVIEW B

ISSN

2469-9950

e-ISSN

—

Svazek periodika

97

Číslo periodika v rámci svazku

23

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

"235442-1"-"235442-9"

Kód UT WoS článku

000436553500002

EID výsledku v databázi Scopus

2-s2.0-85049211021