Berlin 2012 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 17: Poster Session
MM 17.83: Poster
Montag, 26. März 2012, 17:00–19:00, Poster B
Electron and spin transport in turbostratic graphene — Sebastian Schweitzer1, Ajit Kumar Patra1, Yenny Hernandez2, Jakoba Heidler3, Xinliang Feng2, Klaus Müllen2, Petr Ostrizek4, and •Mathias Kläui1,3,4 — 1FB Physik, Universität Konstanz, Universitätsstr. 10, D-78457 Konstanz, Germany — 2Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany — 3SwissFEL, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland — 4Institut für Physik, Johannes Gutenberg Universität, Staudinger Weg 7, 55128 Mainz, Germany
The excellent physical properties of graphene make it a promising material for many scientific applications. The high electron mobility [1] and the relatively long spin lifetime [2] leading in spin diffusion lengths λ up to 2 microns [3], which make it a very interesting candidate for spintronics. By using of turbostratic graphene (TG), a multilayer of electronically decoupled graphene layers, one can overcome limits of λ like interaction between substrate and graphene as well as intrinsic corrugation in graphene sheets. TG combines the exciting properties of graphene with the higher robustness to environmental influences and the absence of inner corrugations of a microstructured material [4]. We present here successful spin injection from ferromagnetic electrodes into TG discs (in non-local spin valve configuration [3]) as well as transport properties of TG. [1] A. K. Geim et al., Nature Materials 6, 183 (2007), Science 324, 1530 (2009). [2] Hernando et al., Phys. Rev. B 74, 155426 (2006). [3] N. Tombros et al., Nature 448, 571 (2007). [4] M. Orlita et al., Phys. Rev. Lett. 101, 267601 (2008).