Bilayer of Terbium Double-Decker Single-Molecule Magnets
Sprache des Titels:
We report a low-temperature scanning tunneling
microscopy and spectroscopy study of the structural and
electronic properties of a bilayer of terbium double-decker
(bis(phthalocyaninato)terbium(III), TbPc2) molecules on
Au(111) at 5 K. The TbPc2 molecules are found to adsorb
flat on top of a first compact TbPc2 monolayer on Au(111),
forming a square-like packing similar to the underlying first
layer. Their frontier-orbital electronic structure, measured by
tunneling conductance spectroscopy, clearly differs from that
of the underlying first monolayer. Our results of second-layer
molecules indicate the absence of, both, hybrid molecule?
substrate electronic states close to the Fermi level and a zerobias
Kondo resonance. We attribute these findings to a
decreased electronic coupling with the Au(111) substrate.