Sub-molecular modulation of a 4f driven Kondo resonance by surface-induced asymmetry.
Coupling between a magnetic impurity and an external bath can give rise to many-body quantum phenomena, including Kondo and Hund's impurity states in metals, and Yu-Shiba-Rusinov states in superconductors. While advances have been made in probing the magnetic properties of d-shell impurities on surfaces, the confinement of f orbitals makes them difficult to access directly. Here we show that a 4f driven Kondo resonance can be modulated spatially by asymmetric coupling between a metallic surface and a molecule containing a 4f-like moment. Strong hybridization of dysprosium double-decker phthalocyanine with Cu(001) induces Kondo screening of the central magnetic moment. Misalignment between the symmetry axes of the molecule and the surface induces asymmetry in the molecule's electronic structure, spatially mediating electronic access to the magnetic moment through the Kondo resonance. This work demonstrates the important role that molecular ligands have in mediating electronic and magnetic coupling and in accessing many-body quantum states.
London Centre for Nanotechnology, University College London (UCL), London WC1H 0AH, UK.|Department of Physics &Astronomy, University College London, London WC1E 6BT, UK.
Ben
B
Warner
London Centre for Nanotechnology, University College London (UCL), London WC1H 0AH, UK.
Fadi
F
El Hallak
Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, D-52425 Jülich, Germany.
Nicolae
http://orcid.org/0000-0002-8203-1227
N
Atodiresei
London Centre for Nanotechnology, University College London (UCL), London WC1H 0AH, UK.|Department of Physics &Astronomy, University College London, London WC1E 6BT, UK.
Philipp
P
Seibt
London Centre for Nanotechnology, University College London (UCL), London WC1H 0AH, UK.
Henning
H
Prüser
Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, D-52425 Jülich, Germany.
Vasile
http://orcid.org/0000-0002-4814-2417
V
Caciuc
School of Chemistry, University of Nottingham, Nottingham NG7 2RD, UK.
Michael
M
Waters
London Centre for Nanotechnology, University College London (UCL), London WC1H 0AH, UK.|Department of Physics &Astronomy, University College London, London WC1E 6BT, UK.
Andrew J
AJ
Fisher
Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, D-52425 Jülich, Germany.
Stefan
S
Blügel
Institut für Physikalische Chemie, University of Stuttgart, 70569 Stuttgart, Germany.
Joris
http://orcid.org/0000-0002-0855-8960
J
van Slageren
London Centre for Nanotechnology, University College London (UCL), London WC1H 0AH, UK.|Department of Physics &Astronomy, University College London, London WC1E 6BT, UK.|Department of Chemistry, University College London, London WC1H 0AJ, UK.
Cyrus F
http://orcid.org/0000-0003-1706-2147
CF
Hirjibehedin
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