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Local defects and ferromagnetism in graphene layers

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TLDR
In this article, the changes in the electronic structure induced by lattice defects in graphene planes were studied and it was shown that lattice distortions give rise to localized states at the Fermi level.
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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The electronic properties of graphene

TL;DR: In this paper, the basic theoretical aspects of graphene, a one-atom-thick allotrope of carbon, with unusual two-dimensional Dirac-like electronic excitations, are discussed.
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Electronic states of graphene nanoribbons studied with the Dirac equation

TL;DR: In this paper, the electronic states of narrow graphene ribbons with zigzag and armchair edges were analyzed using the Dirac equation with appropriate boundary conditions, showing that the boundary condition allows a particlelike and a hole-like band with evanescent wave functions confined to the surfaces, which continuously turn into zero energy surface states as the width gets large.
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Electronic properties of disordered two-dimensional carbon

TL;DR: In this article, the effects of localized (impurities or vacancies) and extended (edges or grain boundaries) defects on the electronic and transport properties of graphene are analyzed in a self-consistent way.
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Electron-Electron Interactions in Graphene: Current Status and Perspectives

TL;DR: In this article, an emerging Dirac liquid of Lorentz invariant quasi-particles in the weak coupling regime and strongly correlated electronic states in the strong coupling regime is discussed.
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Emergence of magnetism in graphene materials and nanostructures

TL;DR: In this paper, a review of magnetic properties of spintronic devices based on carbon nanofragments and graphite is presented, with the help of computational examples based on simple model Hamiltonians.
References
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Journal ArticleDOI

Electron-electron interactions in graphene sheets

TL;DR: In this paper, the effects of the electron-electron interactions in a graphene layer are investigated and it is shown that short-range couplings are irrelevant and scale towards zero at low energies, due to the vanishing of density of states at the Fermi level.
Journal ArticleDOI

Unconventional Quasiparticle Lifetime in Graphite.

TL;DR: The influence of electron-electron scattering on quasiparticle lifetimes in graphite is calculated and the inverse lifetime increases linearly with energy, in agreement with recent experiments.
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Reentrant metallic behavior of graphite in the quantum limit.

TL;DR: Magnetotransport measurements performed on several well-characterized highly oriented pyrolitic graphite and single crystalline Kish graphite samples reveal a reentrant metallic behavior in the basal-plane resistance at high magnetic fields, when only the lowest Landau levels are occupied.
Journal ArticleDOI

Zero-conductance resonances due to flux states in nanographite ribbon junctions

TL;DR: Electronic transport properties through junctions in nanographite ribbons are investigated using the Landauer approach, which shows a rich structure with sharp dips of zero conductance in the low-energy regime.
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Ferromagnetism of a graphite nodule from the Canyon Diablo meteorite

TL;DR: It is suggested that the ferromagnetism is a magnetic proximity effect induced at the interface with magnetite or kamacite inclusions, which is strongly ferromagnetic at room temperature.
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