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Dresden 2009 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 26: Transport: Graphene and Carbon Nanotubes

TT 26.10: Vortrag

Mittwoch, 25. März 2009, 16:45–17:00, HSZ 03

Conductance of graphene ribbons in the presence of chemical adsorbatesPetra Dietl1, •Georgo Metalidis1, Pablo San-Jose1,2, Dmitri Golubev1, Elsa Prada1,2, Henning Schomerus2, and Gerd Schön11Institut für Theoretische Festkörperphysik and DFG-Center for Functional Nanostructures, Universität Karlsruhe, D-76128 Karlsruhe, Germany — 2Department of Physics, Lancaster University, Lancaster, LA1 4YB, United Kingdom

Chemical adsorbates on a graphene sheet have a large influence on its transport properties, making graphene a candidate system for chemical sensors. The influence of adsorbates on the graphene conductivity is twofold. On one hand they can dope the graphene sheet, thus increasing its conductance, while on the other hand the adsorbates form scattering centers that will decrease the conductance. We have investigated the interplay between these competing effects and observed some interesting properties, one of them being an extremely long localization length for certain types of adsorbates.

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