Dresden 2011 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 33: Focus Session "Spins in Organic Materials I" (jointly with DS)
MA 33.4: Vortrag
Mittwoch, 16. März 2011, 12:30–12:45, GER 37
Design of the Local Spin-Polarization at Hybrid Organic-Ferromagnetic Interfaces — •Nicolae Atodiresei1, Predrag Lazić2, Vasile Caciuc1, and Stefan Blügel1 — 1Peter Grünberg Institut & Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425-Jülich, Germany — 2Massachusetts Institute of Technology, Cambridge, 02139-Massachusetts, USA
Combining molecular electronics with spintronics represents one of the most exciting avenues in building future nanoelectronic devices. In this context, a clear understanding of the physics at magnetic electrode-molecule interfaces is highly desirable and, in particular, first principles simulations are used to elucidate and design the functionality of specific molecules in a given organic-metal surface environment. We will present a conceptual study to understand the manipulation of the local spin-polarization present at the interface for several single organic molecules adsorbed on a ferromagnetic surface. The generality of the concept predicted by the theoretical calculations on model systems is further strengthened by the spin-polarized scanning tunneling microscopy (SP-STM)experiments. In this study it is demonstrated that, by an appropriate selection of the adsorbed molecules, the electrons of different spin [i.e. up and down] can selectively be injected from the same ferromagnetic surface by locally controlling the spin-polarization. [1] N. Atodiresei et al. Phys. Rev. Lett. 102, 136809 (2009); [2] J. Brede et al. Phys. Rev. Lett. 105, 047204 (2010); [3] N. Atodiresei et al. Phys. Rev. Lett. 105, 066601 (2010).