Recent experiments performed on suspended graphene had indicated the existence of intrinsic defects on the samples. It was known that lattice defects such as vacancies or voids leaving unpaired atoms, led to the formation of local magnetic moments. The existence and ordering of these moments was largely determined by the bipartite character of the honeycomb lattice seen as two interpenetrating triangular sub-lattices. Dislocations made by pentagon–heptagon pairs or octagons with an unpaired atom were studied recently and found to be stable in the graphene lattice. These defects frustrate the sub lattice structure and affected the magnetic properties of graphene. The magnetic properties of graphene in the presence of these defects were studied. The system was described by a pz tight-binding model with electron–electron interactions modelled by a Hubbard term. Spin-polarized mean-field solutions were investigated within an unrestricted Hartree–Fock approximation

Shuffle Dislocation Induced Magnetic Moment in Graphene. M.P.López-Sancho, F.de Juan, M.A.H.Vozmediano: Journal of Magnetism and Magnetic Materials, 2010, 322[9-12], 1167-9