The role of pressure on the magnetism of bilayer graphene

Details The role of pressure on the magnetism of bilayer graphene The role of pressure on the magnetism of bilayer graphene

2011-05-07

arxiv.org/abs/1105.1426v1

Phys. Rev. B 84, 075432 (2011)

Physics

Condensed Matter

Materials Science

Scientific paper

We study the effect of pressure on the localized magnetic moments induced by vacancies in bilayer graphene in the presence of topological defects breaking the bipartite nature of the lattice. By using a mean-field Hubbard model we address the two inequivalent types of vacancies that appear in the Bernal stacking bilayer graphene. We find that by applying pressure in the direction perpendicular to the layers the critical value of the Hubbard interaction needed to polarize the system decreases. The effect is particularly enhanced for one type of vacancies, and admits straightforward generalization to multilayer graphene in Bernal stacking and graphite. The present results clearly demonstrate that the magnetic behavior of multilayer graphene can be affected by mechanical transverse deformation.

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