Tight-binding study of nonmagnetic-defect-induced magnetism in graphene

This review describes a study of nonmagnetic-defect-induced magnetism of graphene on the basis of a tight-binding model. A vacancy induces around itself a quasilocalized impurity state at the chemical potential and leads to formation of local magnetic moments. The connection between a quasilocalized state around a vacancy and the edge localized states near a zigzag edge is studied in detail. Magnetism associated with many vacancies and edge structures is also reviewed. Some new results of magnetism associated with many vacancies are presented. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2981392]