Coulomb Interactions and Ferromagnetism in Pure and Doped Graphene

Details Coulomb Interactions and Ferromagnetism in Pure and Doped Graphene Coulomb Interactions and Ferromagnetism in Pure and Doped Graphene

2005-07-03

arxiv.org/abs/cond-mat/0507061v2

Phys. Rev. B vol. 72, 174406 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages; published version

Scientific paper

10.1103/PhysRevB.72.174406

We study the presence of ferromagnetism in the phase diagram of the two-dimensional honeycomb lattice close to half-filling (graphene) as a function of the strength of the Coulomb interaction and doping. We show that exchange interactions between Dirac fermions can stabilize a ferromagnetic phase at low doping when the coupling is sufficiently large. In clean systems, the zero temperature phase diagram shows both first order and second order transition lines and two distinct ferromagnetic phases: one phase with only one type of carriers (either electrons or holes) and another with two types of carriers (electrons and holes). Using the coherent phase approximation (CPA) we argue that disorder further stabilizes the ferromagnetic phase.

Affiliated with

Also associated with

No associations

Rating

Coulomb Interactions and Ferromagnetism in Pure and Doped 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 Coulomb Interactions and Ferromagnetism in Pure and Doped Graphene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coulomb Interactions and Ferromagnetism in Pure and Doped Graphene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-209237