Regensburg 2010 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

O: Fachverband Oberflächenphysik

O 41: Poster Session I (Semiconductor Substrates: Epitaxy and growth; Semiconductor Substrates: Adsorbtion; Semiconductor Substrates: Solid-liquid interfaces; Semiconductor Substrates: Clean surfaces; Oxides and insulators: Epitaxy and growth; Oxides and insulators: Adsorption; Oxides and insulators: Clean surfaces; Organic, polymeric and biomolecular films - also with adsorbates; Organic electronics and photovoltaics, Surface chemical reactions; Heterogeneous catalysis; Phase transitions; Particles and clusters; Surface dynamics; Surface or interface magnetism; Electron and spin dynamics; Spin-Orbit Interaction at Surfaces; Electronic structure; Nanotribology; Solid/liquid interfaces; Graphene; Others)

O 41.35: Poster

Dienstag, 23. März 2010, 18:30–21:00, Poster B1

Dominant spin-relaxation processes in the organic semiconductor CuPc determined by means of spin-resolved two-photon photoemission — •Kathrin Koffler, Sabine Neuschwander, Jan-Peter Wüstenberg, Mirko Cinchetti, and Martin Aeschlimann — Department of Physics, University of Kaiserslautern, 67663 Kaiserslautern, Germany

Organic semiconductors (OSC) are considered as ideal materials for spintronic devices due to their chemical flexibility, their low production costs and the intrinsically low spin-orbit coupling [1]. A fundamental prerequisite for organic spintronic devices is an efficient spin injection from a ferromagnetic electrode into the OSC. With spin-resolved two-photon photoemission, a model system consisting of a thin cobalt film and the OSC copper phthalocyanine (CuPc) has been studied with focus on interfacial effects on spin injection and on the spin transport properties of CuPc [2]. In this contribution we extend the approach presented in [2] to determine the temperature dependence of the spin diffusion length in CuPc. This allows to draw conclucions about the spin relaxation mechanisms responsible for the polarization decay in the OSC CuPc.

[1] V.A. Dediu et al., Nature Mater. 8, 707-716 (2009)

[2] M. Cinchetti et al., Nature Mater. 8, 115-119 (2009)