Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

O: Fachverband Oberflächenphysik

O 62: Graphene III

O 62.2: Vortrag

Donnerstag, 25. März 2010, 10:45–11:00, H31

Atomic structure of graphene on Rh(111) — •Mikhail Fonin¹, Ole Zander¹, Muriel Sicot¹, Samuel Bouvron¹, Ulrich Rüdiger¹, Yuriy S. Dedkov², and Karsten Horn² — ¹Fachbereich Physik, Universität Konstanz, 78457 Konstanz — ²Fritz-Haber-Institut der Max-Planck-Gesellschaft, 14195 Berlin

Exceptional transport properties of graphene, a two-dimensional honeycomb lattice of sp²-bonded carbon atoms [1], recently observed on exfoliated quasi-free-standing samples make it a promising material for applications in microelectronics and sensing.

Here, we present a systematic scanning tunneling microscopy (STM) study of the atomic structure of graphene monolayer on the Rh(111) surface. Depending on the preparation conditions a multi-domain or a single domain graphene monolayer can be obtained. Atomically-resolved imaging of the graphene surface shows a moiré structure with pronounced buckling due to a strong interaction with the metal substrate. We show the most abundant moiré pattern in the multi-domain graphene which has the same structure as that in the single domain layer differs distinctly from those previously reported for graphene on Ir(111) or Ru(0001) as well as for h-BN nanomesh on Rh(111). Moreover, STM reveals a small rotation between graphene superstructure and metal lattices resulting in the formation of chiral domains.

This work is supported by DFG through SFB 767 (TP C5).

[1] A. K. Geim and K. S. Novoselov, Nature Mater. 6, 183 (2007).