Tuning molecule-mediated spin coupling in bottom-up-fabricated vanadium-tetracyanoethylene nanostructures.
We have fabricated hybrid magnetic complexes from V atoms and tetracyanoethylene ligands via atomic manipulation with a cryogenic scanning tunneling microscope. Using tunneling spectroscopy we observe spin-polarized molecular orbitals as well as Kondo behavior. For complexes having two V atoms, the Kondo behavior can be quenched for different molecular arrangements, even as the spin-polarized orbitals remain unchanged. This is explained by variable spin-spin (i.e., V-V) ferromagnetic coupling through a single tetracyanoethylene (TCNE) molecule, as supported by density functional calculations.
Department of Physics, University of California, Berkeley, Berkeley, California 94720-7300, USA.
Daniel
D
Wegner
Ryan
R
Yamachika
Xiaowei
X
Zhang
Yayu
Y
Wang
Tunna
T
Baruah
Mark R
MR
Pederson
Bart M
BM
Bartlett
Jeffrey R
JR
Long
Michael F
MF
Crommie