Manipulation of Spin Polarization in Boron-Substituted Graphene Nanoribbons

Kewei Sun, Orlando J. Silveira, Shohei Saito, Keisuke Sagisaka, Shigehiro Yamaguchi, Adam S. Foster, Shigeki Kawai*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

The design of magnetic topological states due to spin polarization in an extended πcarbon system has great potential in spintronics application. Although magnetic zigzag edges in graphene nanoribbons (GNRs) have been investigated earlier, real-space observation and manipulation of spin polarization in a heteroatom substituted system remains challenging. Here, we investigate a zero-bias peak at a boron site embedded at the center of an armchair-type GNR on a AuSiX/Au(111) surface with a combination of low-temperature scanning tunneling microscopy/spectroscopy and density functional theory calculations. After the tip-induced removal of a Si atom connected to two adjacent boron atoms, a clear Kondo resonance peak appeared and was further split by an applied magnetic field of 12 T. This magnetic state can be relayed along the longitudinal axis of the GNR by sequential removal of Si atoms.

Original languageEnglish
Pages (from-to)11244–11250
Number of pages7
JournalACS Nano
Volume16
Issue number7
Early online date22 Jun 2022
DOIs
Publication statusPublished - 26 Jul 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • AuSilayer
  • boron substituted graphene nanoribbons
  • Kondo resonance
  • scanning tunneling microscopy/spectroscopy
  • silicon atoms
  • spin polarization

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