Berlin 2015 – wissenschaftliches Programm
TT 50.6: Poster
Dienstag, 17. März 2015, 18:15–21:00, Poster A
Electronic and transport properties of graphene nanoribbons on Ni(111) — •Bernhard Kretz1 and Aran Garcia-Lekue1,2 — 1Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, E-20018 San Sebastian, Spain — 2IKERBASQUE, Basque Foundation for Science, E-48011 Bilbao, Spain
It is well known that graphene holds a great potential for electronic applications. The graphene-Ni system is an interesting case where the interaction with the ferromagnetic substrate gives rise to a number of remarkable phenomena. In particular, the spin-dependent scattering of electrons at the edges of graphene islands on Ni(111) makes this system very interesting for spintronic devices. Besides, the electron scattering is found to be dependent on the detailed edge structure of the graphene islands, which can exhibit unreconstructed or Stone-Wales reconstructed zigzag edge conformations. In this work, we study the influence of the edge structure on the transport properties across graphene-Ni junctions. We consider graphene nanoribbons on Ni(111) with an unreconstructed and a Stone-Wales reconstructed zigzag edge, both of which are unpassivated, and we use density functional theory (DFT) calculations using the SIESTA and TranSIESTA codes.
V. M. Karpan et al., Phys. Rev. Lett. 99, 176602 (2007); M. Weser et al., APL 96, 012504 (2010)
 A. Garcia-Lekue et al., PRL 112, 066802 (2014)
 A. Garcia-Lekue et al., submitted