Corpus ID: 119405296

Long range dynamical coupling between magnetic adatoms mediated by a 2D topological insulator

@article{Costa2018LongRD,
  title={Long range dynamical coupling between magnetic adatoms mediated by a 2D topological insulator},
  author={M. Costa and M. Nardelli and A. Fazzio and Ant{\'o}nio Manuel de Almeida Costa},
  journal={arXiv: Strongly Correlated Electrons},
  year={2018}
}
We study the spin excitation spectra and the dynamical exchange coupling between iron adatoms on a Bi bilayer nanoribbon. We show that the topological character of the edge states is preserved in the presence of the magnetic adatoms. Nevertheless, they couple significantly to the edge spin currents, as witnessed by the large and long-ranged dynamical coupling we obtain in our calcula- tions. The large effective magnetocrystalline anisotropy of the magnetic adatoms combined with the transport… Expand
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