Strong covalent bonding between two graphene layers

Details Strong covalent bonding between two graphene layers Strong covalent bonding between two graphene layers

2007-07-31

arxiv.org/abs/0707.4575v1

Phys. Rev. B 77, 045403 (2008)

Physics

Condensed Matter

Materials Science

tar gzip latex 4 pages 4 figures

Scientific paper

10.1103/PhysRevB.77.045403

We show that two graphene layers stacked directly on top of each other (AA stacking) form strong chemical bonds when the distance between planes is 0.156 nm. Simultaneously, C-C in-plane bonds are considerably weakened from partial double-bond (0.141 nm) to single bond (0.154 nm). This polymorphic form of graphene bilayer is meta-stable w.r.t. the one bound by van der Waals forces at a larger separation (0.335 nm) with an activation energy of 0.16 eV/cell. Similarly to the structure found in hexaprismane, C forms four single bonds in a geometry mixing 90^{0} and 120^{0} angles. Intermediate separations between layers can be stabilized under external anisotropic stresses showing a rich electronic structure changing from semimetal at van der Waals distance, to metal when compressed, to wide gap semiconductor at the meta-stable minimum.

Affiliated with

Also associated with

No associations

Rating

Strong covalent bonding between two graphene layers 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 Strong covalent bonding between two graphene layers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Strong covalent bonding between two graphene layers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-222444