Dresden 2009 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 8: Postersession Transport: Graphene and Carbon Nanotubes

TT 8.3: Poster

Montag, 23. März 2009, 13:00–16:45, P1B

Ab-Initio Studies of Electronic and Transport Properties of Graphene Nanoribbons — Uwe Treske^1,2, Frank Ortmann^1,2, •Björn Oetzel^1,2, Karsten Hannewald^1,2, and Friedhelm Bechstedt^1,2 — ¹Institut für Festkörpertheorie und -optik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany — ²European Theoretical Spectroscopy Facility, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany

We present ab-initio DFT calculations for Graphene Nanoribbons (GNRs). We focus our attention on the band structures and gap behavior versus ribbon widths for armchair and zigzag GNRs. Furthermore we study the influence of spin polarization and spin ordering on the band structure and the magnetic behavior of zigzag GNRs. The transmission functions are calculated in the Landauer-Büttiker formalism using the number-of-states approach similarities and differences of quantum transport are discussed for several groups of armchair and zigzag GNRs.