Locally Induced Spin States on Graphene by Chemical Attachment of Boron Atoms

Qing Li, Haiping Lin, Ruitao Lv, Mauricio Terrones Maldonado, Lifeng Chi, Werner A. Hofer, Minghu Pan

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Pristine graphene is known to be nonmagnetic due to its π-conjugated electron system. However, we find that localized magnetic moments can be generated by chemically attaching boron atoms to the graphene sheets. Such spin-polarized states are evidenced by the spin-split of the density of states (DOS) peaks near the Fermi level in scanning tunneling spectroscopy (STS). In the vicinity of several coadsorbed boron atoms, the Coulomb repulsion between multiple spins leads to antiferromagnetic coupling for the induced spin states in the graphene lattice, manifesting itself as an increment of spin-down state at specific regions. Experimental observations and interpretations are rationalized by extensive density functional theory (DFT) simulations.

Original languageEnglish (US)
Pages (from-to)5482-5487
Number of pages6
JournalNano letters
Volume18
Issue number9
DOIs
StatePublished - Sep 12 2018

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Boron
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Graphene
attachment
graphene
boron
Atoms
atoms
Magnetic moments
Fermi level
Density functional theory
Spectroscopy
Scanning
Electrons
magnetic moments
density functional theory
scanning
spectroscopy
electrons
simulation

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Li, Qing ; Lin, Haiping ; Lv, Ruitao ; Terrones Maldonado, Mauricio ; Chi, Lifeng ; Hofer, Werner A. ; Pan, Minghu. / Locally Induced Spin States on Graphene by Chemical Attachment of Boron Atoms. In: Nano letters. 2018 ; Vol. 18, No. 9. pp. 5482-5487.
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Locally Induced Spin States on Graphene by Chemical Attachment of Boron Atoms. / Li, Qing; Lin, Haiping; Lv, Ruitao; Terrones Maldonado, Mauricio; Chi, Lifeng; Hofer, Werner A.; Pan, Minghu.

In: Nano letters, Vol. 18, No. 9, 12.09.2018, p. 5482-5487.

Research output: Contribution to journalArticle

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AB - Pristine graphene is known to be nonmagnetic due to its π-conjugated electron system. However, we find that localized magnetic moments can be generated by chemically attaching boron atoms to the graphene sheets. Such spin-polarized states are evidenced by the spin-split of the density of states (DOS) peaks near the Fermi level in scanning tunneling spectroscopy (STS). In the vicinity of several coadsorbed boron atoms, the Coulomb repulsion between multiple spins leads to antiferromagnetic coupling for the induced spin states in the graphene lattice, manifesting itself as an increment of spin-down state at specific regions. Experimental observations and interpretations are rationalized by extensive density functional theory (DFT) simulations.

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