Spin-orbit proximity effect in graphene on metallic substrates: Decoration versus intercalation with metal adatoms

Jagoda Slawinska*, Jorge I. Cerda

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)
9 Downloads (Pure)

Abstract

The so-called spin-orbit proximity effect experimentally realized in graphene (G) on several different heavy metal surfaces opens a new perspective to engineer the spin-orbit coupling for new generation spintronics devices. Here, via large-scale density functional theory calculations performed for two distinct graphene/metal models, G/Pt(111) and G/Au/Ni(111), we show that the spin-orbit splitting of the Dirac cones (DCs) in these structures might be enhanced by either adsorption of adatoms on top of graphene (decoration) or between the graphene and the metal (intercalation). While the decoration by inducing strong graphene-adatom interaction suppresses the linearity of the G's pi bands, the intercalated structures reveal a weaker adatom-mediated graphene/substrate hybridization which preserves well-defined although broadened DCs. Remarkably, the intercalated G/Pt(111) structure exhibits splittings considerably larger than the defect-free case.

Original languageEnglish
Article number073018
Number of pages12
JournalNew Journal of Physics
Volume21
DOIs
Publication statusPublished - 3-Jul-2019
Externally publishedYes

Keywords

  • graphene
  • density functional theory (DFT)
  • spin-orbit coupling
  • spin texture
  • adatoms
  • metallic surfaces

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