Dresden 2014 – scientific programme
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O: Fachverband Oberflächenphysik
O 77: Focussed Session: Towards a Quantitative Understanding of Complex Adsorption Structures: Surface Science goes Organic III
O 77.9: Talk
Thursday, April 3, 2014, 18:15–18:30, TRE Phy
Accessing 4f-states in single-molecule spintronics — •Frank Matthes1,4, Sarah Fahrendorf1,4, Nicolae Atodiresei2,4, Claire Besson3,4, Vasile Caciuc2,4, Stefan Blügel2,4, Paul Kögerler3,4, Daniel E. Bürgler1,4, and Claus M. Schneider1,4 — 1Peter Grünberg Institute, Electronic Properties, Forschungszentrum Jülich, Germany — 2Peter Grünberg Institute and Institute for Advanced Simulation, Quantum Theory of Materials, Forschungszentrum Jülich, Germany — 3Institute of Inorganic Chemistry, RWTH Aachen University, Germany — 4Jülich-Aachen Research Alliance, Fundamentals for Future Information Technology, Forschungszentrum Jülich, Germany
Magnetic molecules are potential functional units for molecular and supramolecular spintronic devices. However, charge transfer and hybridization may modify the electronic structure and thereby influence or even quench the molecular magnetic moment. Yet, detection and manipulation of the molecular spin state by means of charge transport, that is, spintronic functionality, mandates a certain level of hybridization of the magnetic orbitals with electrode states. Here we show how a judicious choice of the molecular spin centres determines these critical molecule-electrode contact characteristics. In contrast to late lanthanide analogues, the 4f-orbitals of single bis(phthalocyaninato)-neodymium(III) molecules adsorbed on Cu(100) can be directly accessed by scanning tunneling microscopy[1]. Hence, they contribute to charge transport, whereas their magnetic moment is sustained as evident from comparing spectroscopic data with ab initio calculations.
[1] S. Fahrendorf et al., Nature Commun. 4, 2425 (2013)