Manipulation of Spin Polarization in Boron-Substituted Graphene Nanoribbons

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date

2022-07-26

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Department of Applied Physics

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Language

en

Pages

7

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ACS Nano, Volume 16, issue 7, pp. 11244–11250

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.

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Funding Information: This work was supported in part by Japan Society for the Promotion of Science (JSPS) KAKENHI Grant Nos. 21F21058, 21K18885, and 22H00285. Computing resources from the Aalto Science-IT project and CSC, Helsinki are gratefully acknowledged. A.S.F. was supported by the World Premier International Research Center Initiative (WPI), MEXT, Japan. K.Sun thanks S. Yoshizawa for his technical support in the STM measurement in the magnetic field. Publisher Copyright: © 2022 American Chemical Society.

Keywords

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

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DOI

10.1021/acsnano.2c04563

Citation

Sun, K, Silveira, O J, Saito, S, Sagisaka, K, Yamaguchi, S, Foster, A S & Kawai, S 2022, 'Manipulation of Spin Polarization in Boron-Substituted Graphene Nanoribbons', ACS Nano, vol. 16, no. 7, pp. 11244–11250. https://doi.org/10.1021/acsnano.2c04563

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https://urn.fi/URN:NBN:fi:aalto-202208174871

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[article-cris] Perustieteiden korkeakoulu / SCI