Periodized discrete elasticity models for defects in graphene

Details Periodized discrete elasticity models for defects in graphene Periodized discrete elasticity models for defects in graphene

2008-05-08

arxiv.org/abs/0805.1220v2

Phys. Rev. B 78, 085406 (2008)

Physics

Condensed Matter

Materials Science

24 pages, 7 figures; comment on model with 3 slip directions, calculation of defect energies, typos corrected

Scientific paper

10.1103/PhysRevB.78.085406

The cores of edge dislocations, edge dislocation dipoles and edge dislocation loops in planar graphene have been studied by means of periodized discrete elasticity models. To build these models, we have found a way to discretize linear elasticity on a planar hexagonal lattice using combinations of difference operators that do not involve symmetrically all the neighbors of an atom. At zero temperature, dynamically stable cores of edge dislocations may be heptagon-pentagon pairs (glide dislocations) or octagons (shuffle dislocations) depending on the choice of initial configuration. Possible cores of edge dislocation dipoles are vacancies, pentagon-octagon-pentagon divacancies, Stone-Wales defects and 7-5-5-7 defects. While symmetric vacancies, divacancies and 7-5-5-7 defects are dynamically stable, asymmetric vacancies and 5-7-7-5 Stone-Wales defects seem to be unstable.

Affiliated with

Also associated with

No associations

Rating

Periodized discrete elasticity models for defects in graphene 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 Periodized discrete elasticity models for defects in graphene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Periodized discrete elasticity models for defects in graphene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-53382