DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2012 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

DS: Fachverband Dünne Schichten

DS 36: Spins in Organic Materials (jointly with MA)

DS 36.7: Talk

Thursday, March 29, 2012, 18:15–18:30, H 1012

Metal-organic hybrid interface states of a ferromagnet/organic semiconductor hybrid junction as basis for engineering spin injection in organic spintronicsStefan Lach1, •Anna Altenhof1, Kartik Tarafder2, Felix Schmitt1, Md. Ehesan Ali2,3, Michael Vogel1, Jens Sauther1, Peter Oppeneer2, and Christiane Ziegler11Dep. of Physics and Research Center OPTIMAS, University of Kaiserslautern, D-67663 Kaiserslautern — 2Dep. of Physics and Astronomy, Uppsala University, S-75120 Uppsala — 3Center for Theoretical Chemistry, Ruhr-University Bochum, D-44801 Bochum

Hybrid spintronic devices that combine organic semiconductors (OSC) with ferromagnetic (FM) substrates are expected to provide a route to devices with improved and new functionalities. A crucial role is played by the FM-OSC interface. State-of-the-art DFT+U calculations in combination with UPS and XPS as well as spin-resolved UPS directly demonstrate the formation of new hybrid interface states (HIS), induced by chemisorption of CuPc, CoPc, and FePc at Co [1]. Whereas FePc and CoPc have only weakly spin-polarized levels at the Fermi level, CuPc shows strong spin-polarization directly at EF. On the other hand, the interaction leads to a vanishing magnetic moment in case of CuPc and a strong ferromagnetic coupling in case of CoPc and FePc. The difference is explained by the symmetry of the d-orbitals which are massively involved in the hybridization. [1] S. Lach, A. Altenhof, K. Tarafder, F. Schmitt, Md. E. Ali, M. Vogel, J. Sauther, P. M. Oppeneer, Ch. Ziegler, Adv. Funct. Mat., in press

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2012 > Berlin