Regensburg 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 25: Surface Magnetism / Magnetic Imaging I
MA 25.3: Vortrag
Donnerstag, 25. März 2010, 10:45–11:00, H23
Resolving the interface magnetism of a molecule-based spin filter — Jens Brede1, •Nicolae Atodiresei2, Stefan Kuck1, Predrag Lasic2, Stefan Blügel2, Roland Wiesendanger1, and Germar Hoffmann1 — 1Institute of Applied Physics, University of Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany — 2Institut für Festkörperforschung and Institute for Advanced Simulation, Forschungszentrum Jülich, 52425 Jülich, Germany
The use of magnetic molecules opens a gateway to a flexible design of spintronic devices to store, manipulate, and read spin information at nanoscale level. Crucial is the precise knowledge of molecular properties at the interface towards an electrode. Progress in this field relies on resolving and understanding the physics at the relevant interface, the role of individual molecular constituents, and the impact of the atomic environment on molecular properties.
In this work, we apply spin-polarized scanning tunneling microscopy to resolve the physics of such an interface formed of a single magnetic metal-organic molecule adsorbed on a magnetic substrate to observe on an atomic scale the operation of single-molecule spin filter. The experimental data reveal a significant and strongly site dependent localization of spin split states at the interface. To understand the resulting spin-polarization, state of the art first principles calculations are performed. The density functional theory code is extended to describe non-local correlation effects present when a molecule and a metallic substrate are in close proximity. The physical processes at the molecule-electrode interface will be discussed.