Edge magnetization and local density of states in chiral graphene nanoribbons

Spatially resolving edge states of chiral graphene nanoribbons

A central question in the field of graphene-related research is how graphene behaves when it is patterned at the nanometre scale with different edge geometries. A fundamental shape relevant to this question is the graphene nanoribbon (GNR), a narrow strip of graphene that can have different chirality depending on the angle at which it is cut. Such GNRs have been predicted to exhibit a wide rang...

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...

Magnetization profile for impurities in graphene nanoribbons

The magnetic properties of graphene-related materials, and in particular, the spin-polarized edge states predicted for pristine graphene nanoribbons (GNRs) with certain edge geometries have received much attention recently due to a range of possible technological applications. However, the magnetic properties of pristine GNRs are not predicted to be particularly robust in the presence of edge d...

Graphene nanoribbons and edge reconstructions

Surface state magnetization and chiral edge states on topological insulators.

We study the interaction between a ferromagnetically ordered medium and the surface states of a topological insulator with a general surface termination that were identified recently [F. Zhang et al. Phys. Rev. B 86, 081303(R) (2012)]. This interaction is strongly crystal face dependent and can generate chiral states along edges between crystal facets even for a uniform magnetization. While mag...