Local defects and ferromagnetism in graphene layers
M. A. H. Vozmediano, M. P. Lopez-Sancho, T. Stauber, and F. Guinea
TL;DR
This paper investigates how lattice defects in graphene induce localized electronic states and magnetic moments, revealing that interactions between these moments are inherently ferromagnetic due to graphene's semimetallic nature.
Contribution
It demonstrates that lattice defects create localized states and magnetic moments in graphene, and that their interactions are ferromagnetic, highlighting a fundamental magnetic property of defective graphene.
Findings
Lattice defects induce localized states at the Fermi level.
Electron-electron interactions lead to local magnetic moments.
RKKY interactions between moments are ferromagnetic.
Abstract
We study the changes in the electronic structure induced by lattice defects in graphene planes. In many cases, lattice distortions give rise to localized states at the Fermi level. Electron-electron interactions lead to the existence of local moments. The RKKY interaction between these moments is always ferromagnetic, due to the semimetallic properties of graphene
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