Graphene: Morphology-Dependent Magnetism in Nanographene: Beyond Nanoribbons (Adv. Funct. Mater. 22/2018)

Stability of edge states and edge magnetism in graphene nanoribbons

Jens Kunstmann,1,* Cem Özdoğan,2 Alexander Quandt,3,4 and Holger Fehske3 1Institute for Materials Science, TU Dresden, Hallwachstr. 3, D-01069 Dresden, Germany 2Department of Materials Science and Engineering, Çankaya University, Balgat, TR-06530 Ankara, Turkey 3Institut für Physik der Universität Greifswald, Felix–Hausdorff-Str. 6, D-17489 Greifswald, Germany 4School of Physics and DST/NRF Cen...

Materials and Wireless Microfluidic Systems for Electronics Capable of Chemical Dissolution on Demand (Adv. Funct. Mater. 92015)

Stacking dependent electronic structure and transport in bilayer graphene nanoribbons

The stacking-dependent electronic structure and transport properties of bilayer graphene nanoribbons suspended between gold electrodes are investigated using density functional theory coupled with non-equilibrium Green’s functional method. We find substantially enhanced electron transmission as well as tunneling currents in the AA stacking of bilayer nanoribbons compared to either single-layer ...

Limited robustness of edge magnetism in zigzag graphene nanoribbons with electrodes.

It is shown that apart from well-known factors, like temperature, substrate, and edge reconstruction effects, also the presence of external contacts is destructive for the formation of magnetic moments at the edges of graphene nanoribbons (GNRs). The edge magnetism gradually decreases when graphene/electrode interfaces become more and more transparent for electrons. In addition to the graphene/...

Magnetism in graphene nanoislands.

We study the magnetic properties of nanometer-sized graphene structures with triangular and hexagonal shapes terminated by zigzag edges. We discuss how the shape of the island, the imbalance in the number of atoms belonging to the two graphene sublattices, the existence of zero-energy states, and the total and local magnetic moment are intimately related. We consider electronic interactions bot...