Journal
NANO LETTERS
Volume 20, Issue 1, Pages 384-388Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.9b04040
Keywords
Single-molecule magnet; Kondo resonance; aluminum-organic molecule complex; LT-UHV STM; molecule manipulation
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Funding
- AtMol European Commission Integrated Project
- Agency of Science, Technology and Research (A*STAR), Singapore The Visiting Investigatorship Program: AtomTech Project (Phase III)
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The Kondo effect results from the interactions of the conduction electrons in a metal bulk with localized magnetic impurities. While adsorbed atop a metallic surface, the on-surface nanoscale version of this effect is observed when a single magnetic atom or a single magnetic molecule (SMM) is interacting with the conduction electrons. SMMs are commonly organometallic complexes incorporating transition-metal atoms in different oxidation states. We demonstrate how a single nonmagnetic neutral tetrabenzo[a,c,j,h]phenazine molecule can be on-surface-coordinated with exactly two aluminum metal atoms (between Al(I) and Al(II) oxidation state on the Au(111) surface) by low-temperature scanning tunneling microscope (LT-STM) single-atom manipulation. It results in a Kondo measurable localized molecular magnetic moment. This opens a new way to design SMM complexes without the need for heavy transition-metal atoms and complex ligands to stabilize the molecular coordination sphere.
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