Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2006-12-25
Eur.Phys.J.ST148:83-89,2007
Physics
Condensed Matter
Strongly Correlated Electrons
Proceedings of the Graphene Conference, MPI PKS Dresden, September 2006
Scientific paper
10.1140/epjst/e2007-00228-2
Defects play a key role in the electronic structure of graphene layers flat or curved. Topological defects in which an hexagon is replaced by an n-sided polygon generate long range interactions that make them different from vacancies or other potential defects. In this work we review previous models for topological defects in graphene. A formalism is proposed to study the electronic and transport properties of graphene sheets with corrugations as the one recently synthesized. The formalism is based on coupling the Dirac equation that models the low energy electronic excitations of clean flat graphene samples to a curved space. A cosmic string analogy allows to treat an arbitrary number of topological defects located at arbitrary positions on the graphene plane. The usual defects that will always be present in any graphene sample as pentagon-heptagon pairs and Stone-Wales defects are studied as an example. The local density of states around the defects acquires characteristic modulations that could be observed in scanning tunnel and transmission electron microscopy.
Cortijo Alberto
Vozmediano Maria A. H.
No associations
LandOfFree
A cosmological model for corrugated graphene sheets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A cosmological model for corrugated graphene sheets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A cosmological model for corrugated graphene sheets will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-122962