Tunable edge magnetism at graphene/graphane interfaces

Details Tunable edge magnetism at graphene/graphane interfaces Tunable edge magnetism at graphene/graphane interfaces

2010-04-25

arxiv.org/abs/1004.4363v1

Phys. Rev. B 82, 085422 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.82.085422

We study the magnetic properties of graphene edges and graphene/graphane interfaces under the influence of electrostatic gates. For this, an effective low-energy theory for the edge states, which is derived from the Hubbard model of the honeycomb lattice, is used. We first study the edge state model in a mean-field approximation for the Hubbard Hamiltonian and show that it reproduces the results of the extended 2D lattice theory. Quantum fluctuations around the mean-field theory of the effective one-dimensional model are treated by means of the bosonization technique in order to check the stability of the mean-field solution. We find that edge magnetism at graphene/graphane interfaces can be switched on and off by means of electrostatic gates. We describe a quantum phase transition between an ordinary and a ferromagnetic Luttinger liquid - a realization of itinerant one-dimensional ferromagnetism. This mechanism may provide means to experimentally discriminate between edge magnetism or disorder as the reason for a transport gap in very clean graphene nanoribbons.

Affiliated with

Also associated with

No associations

Rating

Tunable edge magnetism at graphene/graphane interfaces 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 Tunable edge magnetism at graphene/graphane interfaces, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tunable edge magnetism at graphene/graphane interfaces will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-186555