TY  - JOUR
AU  - Esat, Taner
AU  - Ternes, Markus
AU  - Temirov, Ruslan
AU  - Tautz, F. Stefan
TI  - Electron spin secluded inside a bottom-up assembled standing metal-molecule nanostructure
JO  - Physical review research
VL  - 5
IS  - 3
SN  - 2643-1564
CY  - College Park, MD
PB  - APS
M1  - FZJ-2023-03412
SP  - 033200
PY  - 2023
AB  - Artificial nanostructures, fabricated by placing atoms or molecules as building blocks in well-defined positions, are a powerful platform in which quantum effects can be studied and exploited. In particular, they offer the opportunity to reduce the electronic interaction between large aromatic molecules and the underlying metallic substrate, if the manipulation capabilities of scanning tunneling microscopy to lift the molecule into an upright geometry on a pedestal of two metal atoms are used. Here, we report a strategy to study this interaction by investigating the Kondo effect. Measurements at millikelvin temperatures and in magnetic fields reveal that this bottom-up assembled standing metal-molecule nanostructure has an S=1/2 spin which is screened by substrate electrons, resulting in a Kondo temperature of only 291±13 mK. We extract its Landé g factor and its exchange coupling Jρ to the substrate, using a third-order perturbation theory in the weak-coupling and high-field regimes. We also show that the interaction between the scanning tunneling microscope tip and the molecule can tune the exchange coupling.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001123024300001
DO  - DOI:10.1103/PhysRevResearch.5.033200
UR  - https://juser.fz-juelich.de/record/1014722
ER  -