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

Lookup NU author(s): Professor Werner Hofer

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This is the authors' accepted manuscript of an article that has been published in its final definitive form by American Chemical Society, 2018.

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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.

Publication metadata

Author(s): Li Qing, Lin Haiping, Lv Ruitao, Terrones Mauricio, Chi Lifeng, Hofer WA, Pan Minghu

Publication type: Article

Publication status: Published

Journal: Nano Letters

Year: 2018

Volume: 18

Issue: 9

Pages: 5482-5487

Print publication date: 12/09/2018

Online publication date: 16/08/2018

Acceptance date: 15/08/2018

Date deposited: 24/08/2018

ISSN (print): 1530-6984

ISSN (electronic): 1530-6992

Publisher: American Chemical Society

URL: https://doi.org/10.1021/acs.nanolett.8b01798

DOI: 10.1021/acs.nanolett.8b01798

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