Dresden 2011 – scientific programme
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DS: Fachverband Dünne Schichten
DS 42: Poster I: Progress in Micro- and Nanopatterning: Techniques and Applications (jointly with O); Spins in Organic Materials; Ion Interactions with Nano Scale Materials; Organic Electronics and Photovoltaics; Plasmonics and Nanophotonics (jointly with HL and O); High-k and Low-k Dielectrics (jointly with DF); Organic Thin Films; Nanoengineered Thin Films; Layer Deposition Processes; Layer Properties: Electrical, Optical, and Mechanical Properties; Thin Film Characterisation: Structure Analysis and Composition; Application of Thin Films
DS 42.12: Poster
Wednesday, March 16, 2011, 15:00–17:30, P1
Energy dependent spin scattering at a hybrid metal-organic interface — •Torsten Methfessel1, Sabine Steil2, Nicolas Großmann2, Kathrin Koffler2, Martin Aeschlimann2, Mirko Cinchetti2, and Hans-Joachim Elmers1 — 1University of Mainz, Institute of Physics, D-55128 Mainz,Germany — 2Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, 67663 Kaiserslautern, Germany
In order to exploit the great potential of hybrid organic-inorganic interfaces for spintronics applications [1], fundamental knowledge about their spin-dependent properties is essential [2, 3]. We investigated the iron-copper phthalocyanine (CuPc) interface by means of spin polarized scanning tunneling spectroscopy (SP-STS) and spin polarized ultraviolet photoemission spectroscopy (SP-UPS). The combination of both techniques allows to measure the interface spin-dependent electronic properties in the energy region of relevance for spintronics applications. By comparing SP-STS and SP-UPS measurements on the Fe-CuPc interface we can distinguish two regions in the interface electronic structure: (i) In the first one (close to EF) where no spin polarized hybrid interface states (SP-HISs) are present, the interface acts as a scattering barrier, characterized by an energy-independent spin-flip probability. (ii) In the second region, the spin-dependent tunnelling probability is dominated by SP-HISs, whose presence is confirmed by the SP-UPS measurements. [1] C. Barraud et al. Nat Phys 6 (2010) 615; [2] M. Cinchetti et al. PRL 104 (2010) 217602; [3] M. Cinchetti, et al. Nat Mater 8 (2009) 115.