Berlin 2015 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 103: Transport: Poster Session
TT 103.34: Poster
Donnerstag, 19. März 2015, 15:00–18:00, Poster B
Charge transport through structurally well-defined graphene nanoribbons — •Nils Richter1, Akimitsu Narita2, Andrea Candini3, Xinliang Feng4, Klaus Müllen2, and Mathias Kläui1 — 1Institut für Physik, Johannes Gutenberg Universität, Mainz, Germany — 2Max Planck Institute for Polymer Research, Mainz, Germany — 3Centro S3, Istituto Nanoscienze CNR, Modena, Italy — 4TU Dresden, Dresden, Germany
Graphene nanoribbons are ultra narrow stripes of graphene, a monolayer material of carbon atoms. Such ribbons are of particular interest because of the new physical phenomena that arise due to their geometrical confinement. Theory predicts a band gap that is dependent on width and edge structure of the ribbons [1]. In chemically synthesized graphene nanoribbons the edge structure is perfect on the atomic level [2]. For the investigation of the charge and spin transport properties we rely on fabricating contacts to the ribbons using the electromigration technique. Nanoribbons that are dispersed in a solvent can then be drop cast on top of these nanojunctions. Besides junctions formed in normal metals we explore graphitic electrodes [3] and ferromagnetic metal electrodes [4]. Using ribbons with different widths and edge geometries, we probe the exciting unconventional properties that have been predicted for these nano-structures [5].
[1] K. Nakada et al. Phys. Rev. B, 54, 24 (1996).
[2] A. Narita et al., Nature Chem. 6, 126 (2014).
[3] A. Candini et al.,
Beilstein Journal of Nanotechnology, submitted (2014).
[4] A. Bieren et al., Phys. Rev. Lett. 110, 067203 (2013).
[5] O. Yazyev, Rep. Prog. Phys. 73, 056501 (2010).