RKKY interaction between adsorbed magnetic impurities in graphene: symmetry and strain effects
arXiv:1307.1234 · doi:10.1103/PhysRevB.88.085405
Abstract
The growing interest in carbon-based spintronics has stimulated a number of recent theoretical studies on the RKKY interaction in graphene, with the aim of determining the most energetically favourable alignments between embedded magnetic moments. The RKKY interaction in undoped graphene decays faster than expected for conventional two-dimensional materials and recent studies suggest that the adsorption configurations favoured by many transition-metal impurities may lead to even shorter ranged decays and possible sign-changing oscillations. Here we show that these features emerge in a mathematically transparent manner when the symmetry of the configurations is included in the calculation. Furthermore, we show that by breaking the symmetry of the graphene lattice, via uniaxial strain, the decay rate, and hence the range, of the RKKY interaction can be significantly altered. Our results suggest that magnetic interactions between adsorbed impurities in graphene can be manipulated by careful strain engineering of such systems.
12 pages, 6 figures, submitted
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- Strain-tuning of vacancy-induced magnetism in graphene nanoribbons
- RKKY Interactions in Graphene Landau Levels
- Signatures of interfacial topological chiral modes via RKKY exchange interaction in Dirac and Weyl systems
- Impurities and electronic localization in graphene bilayers
- Selective generation and amplification of RKKY interactions by P-N interface
- On the Sign of Fermion-Mediated Interactions
- Spin Stiffness and Domain Walls in Dirac-Electron Mediated Magnets
- Sublattice Segregation of Hydrogen Adsorbates in Carbon Nanotubes
- Dynamic RKKY interaction between magnetic moments in graphene nanoribbons
- RKKY interaction in graphene at finite temperature
- Effect of Inter-Adatoms Correlations on the Local Density of States of Graphene
- Variable range of the RKKY interaction in edged graphene
- Numerical package for QFT calculations of defect-induced phenomena in graphene