Ferromagnetism in chiral multilayer 2D semimetals

Abstract

We calculate the temperature dependent long-range magnetic coupling in the presence of dilute concentrations of random magnetic impurities in chiral multilayer two-dimensional semimetals, i.e., undoped intrinsic multilayer graphene. Assuming a carrier-mediated indirect RKKY exchange interaction among the well-separated magnetic impurities with the itinerant carriers mediating the magnetic interaction between the impurities, we investigate the magnetic properties of intrinsic multilayer graphene using an effective chiral Hamiltonian model. We find that due to the enhanced density of states in the rhombohedral stacking sequence of graphene layers, the magnetic ordering of multilayer graphene is ferromagnetic in the continuum limit. The ferromagnetic transition temperature is calculated using a finite-temperature self-consistent field approximation and found to be within the experimentally accessible range for reasonable values of the impurity-carrier coupling.

8 pages, 5 figures

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• Theory of ferromagnetic (III,Mn)V semiconductors
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• Dynamical polarization of graphene at finite doping
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• Diluted Graphene Antiferromagnet
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• RKKY Interaction in Graphene from Lattice Green's Function
• Screening, Kohn anomaly, Friedel oscillation, and RKKY interaction in bilayer graphene
• Kondo Quantum Criticality of Magnetic Adatoms in Graphene
• Competition between Kondo effect and RKKY physics in graphene magnetism
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Cited by in corpus (7)

• Noncollinear twisted RKKY interaction on the optically driven SnTe(001) surface
• Velocity-determined anisotropic behaviors of RKKY interaction in 8-\textit{Pmmn} borophene
• RKKY Interactions in Graphene Landau Levels
• Diluted magnetic Dirac-Weyl materials: Susceptibility and ferromagnetism in three-dimensional chiral gapless semimetals
• Impurity States and Indirect Exchange Interaction in Irradiated Graphene
• Spin Stiffness and Domain Walls in Dirac-Electron Mediated Magnets
• RKKY interaction in Mn-doped 4 $\times$ 4 Luttinger systems