Topological features of engineered arrays of adsorbates in honeycomb lattices

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • Luis A. Gonzalez-Arraga
  • Jose Lado

  • Francisco Guinea

Research units

  • IMDEA Institute
  • International Iberian Nanotechnology Laboratory
  • University of Manchester

Abstract

Hydrogen adatoms are one of the most the promising proposals for the functionalization of graphene. The adatoms induce narrow resonances near the Dirac energy, which lead to the formation of magnetic moments. Furthermore, they also create local lattice distortions which enhance the spin-orbit coupling. The combination of magnetism and spin-orbit coupling allows for a rich variety of phases, some of which have non-trivial topological features. We analyze the interplay between magnetism and spin-orbit coupling in ordered arrays of adsorbates on honeycomb lattice monolayers, and classify the different phases that may arise. We extend our model to consider arrays of adsorbates in graphene-like crystals with stronger intrinsic spin-orbit couplings. We also consider a regime away from half-filling in which the Fermi level is at the bottom of the conduction band, we find a Berry curvature distribution corresponding to a Valley-Hall effect.

Details

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalPhysica B: Condensed Matter
Volume496
Publication statusPublished - 1 Sep 2016
MoE publication typeA1 Journal article-refereed

    Research areas

  • Graphene, Quantum-anomalous Hall effect, Spin-orbit coupling, Valley Hall effect

ID: 36720036