Instabilities of the AA-stacked graphene bilayer

Details Instabilities of the AA-stacked graphene bilayer Instabilities of the AA-stacked graphene bilayer

2011-11-22

arxiv.org/abs/1111.5093v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 eps figure, submitted to Phys. Rev. Lett

Scientific paper

Tight-binding calculations predict that the AA-stacked graphene bilayer has one electron and one hole conducting bands, and that the Fermi surfaces of these bands coincide. We demonstrate that as a result of this degeneracy, the bilayer becomes unstable with respect to a set of spontaneous symmetry violations. Which of the symmetries is broken depends on the microscopic details of the system. We find that antiferromagnetism is the more stable order parameter. This order is stabilized by the strong on-site Coulomb repulsion. For an on-site repulsion energy typical for graphene systems, the antiferromagnetic gap can exist up to room temperatures.

Affiliated with

Also associated with

No associations

Rating

Instabilities of the AA-stacked graphene bilayer 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 Instabilities of the AA-stacked graphene bilayer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Instabilities of the AA-stacked graphene bilayer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-552474