Sub-molecular modulation of a 4f driven Kondo resonance by surface-induced asymmetry

Ben Warner, Fadi El Hallak, Nicolae Atodiresei (), Philipp Seibt, Henning Prüser, Vasile Caciuc, Michael Waters, Andrew J. Fisher, Stefan Blügel, Joris van Slageren and Cyrus F. Hirjibehedin ()
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Ben Warner: London Centre for Nanotechnology, University College London (UCL)
Fadi El Hallak: London Centre for Nanotechnology, University College London (UCL)
Nicolae Atodiresei: Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA
Philipp Seibt: London Centre for Nanotechnology, University College London (UCL)
Henning Prüser: London Centre for Nanotechnology, University College London (UCL)
Vasile Caciuc: Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA
Michael Waters: School of Chemistry, University of Nottingham
Andrew J. Fisher: London Centre for Nanotechnology, University College London (UCL)
Stefan Blügel: Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA
Joris van Slageren: Institut für Physikalische Chemie, University of Stuttgart
Cyrus F. Hirjibehedin: London Centre for Nanotechnology, University College London (UCL)

Nature Communications, 2016, vol. 7, issue 1, 1-6

Abstract: Abstract 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.

Date: 2016
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DOI: 10.1038/ncomms12785

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