Long-range exchange interaction between magnetic impurities in graphene

Abstract

The effective spin exchange coupling between impurities (adatoms) on graphene mediated by conduction electrons is studied as a function of the strength of the potential part of the on-site energy $U$ of the electron-adatom interaction. With increasing $U$, the exchange coupling becomes long-range, determined largely by the impurity levels with energies close to the Dirac points. When adatoms reside on opposite sublattices, their exchange coupling, normally antiferromagnetic, becomes ferromagnetic and resonantly enhanced at a specific distance where an impurity level crosses the Dirac point.

7 pages, 3 figures

References in corpus (28)

• The electronic properties of graphene
• Control of graphene's properties by reversible hydrogenation
• Magnetism in Graphene Induced by Single-Atom Defects
• Emergence of magnetism in graphene materials and nanostructures
• Atomic-scale control of graphene magnetism using hydrogen atoms
• Disorder Induced Localized States in Graphene
• Modeling disorder in graphene
• RKKY in half-filled bipartite lattices: graphene as an example
• Gate-Controlled Ionization and Screening of Cobalt Adatoms on a Graphene Surface
• Diluted Graphene Antiferromagnet
• Magnetic and Electronic Properties of Metal-Atom Adsorbed Graphene
• Impurity-induced states on the surface of 3D topological insulators
• RKKY Interaction in Graphene from Lattice Green's Function
• RKKY coupling in graphene
• Adatoms and clusters of 3d transition metals on graphene: Electronic and magnetic configurations
• RKKY interaction in graphene
• RKKY Interaction in Graphene Calculated Following Ruderman and Kittel
• Long-Range Interaction Between Adatoms in Graphene
• RKKY interaction of magnetic impurities in Dirac and Weyl semimetals
• Indirect Exchange and Ruderman-Kittel-Kasuya-Yosida (RKKY) Interactions in Magnetically-Doped Graphene
• Universal Magnetic Properties of sp${}^3$-type Defects in Covalently Functionalized Graphene
• Peierls-type Instability and Tunable Band Gap in Functionalized Graphene
• Influence of the degree of decoupling of graphene on the properties of transition metal adatoms
• Sublattice ordering in a dilute ensemble of defects in graphene
• Attraction-repulsion transition in the interaction of adatoms and vacancies in graphene
• Transport anomaly at the ordering transition for adatoms on graphene
• Resonant finite-size impurities in graphene, unitary limit and Friedel oscillations
• Indirect exchange interaction between magnetic adatoms in graphene

Cited by in corpus (8)

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• Impurity States and Indirect Exchange Interaction in Irradiated Graphene
• Kondo effect due to a hydrogen impurity in graphene: a multichannel Kondo problem with diverging hybridization
• On the Sign of Fermion-Mediated Interactions
• Many-impurity phonon Casimir effect in atomic chains
• RKKY interaction in graphene at finite temperature
• Role of atomic vacancies and second-neighbor antiferromagnetic-exchange coupling in a ferromagnetic nanoparticle
• Numerical package for QFT calculations of defect-induced phenomena in graphene