Manipulation of Spin Polarization in Boron-Substituted Graphene Nanoribbons,ACS Nano

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Manipulation of Spin Polarization in Boron-Substituted Graphene Nanoribbons
ACS Nano ( IF 15.8 ) Pub Date : 2022-06-22 , DOI: 10.1021/acsnano.2c04563
Kewei Sun ₁ , Orlando J Silveira ₂ , Shohei Saito ₃ , Keisuke Sagisaka ₁ , Shigehiro Yamaguchi ₄ , Adam S Foster _{2,

5} , Shigeki Kawai _{1,

6}

Affiliation

The design of magnetic topological states due to spin polarization in an extended π carbon 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 AuSi_X/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.

中文翻译：

硼取代石墨烯纳米带中自旋极化的调控

在扩展的 π 碳系统中由于自旋极化而设计的磁性拓扑状态在自旋电子学应用中具有巨大的潜力。尽管早些时候已经研究了石墨烯纳米带 (GNR) 中的磁性之字形边缘，但杂原子取代系统中自旋极化的真实空间观察和操纵仍然具有挑战性。_{在这里，我们研究了嵌入在 AuSi X}上扶手椅型 GNR 中心的硼位点的零偏置峰/Au(111) 表面结合低温扫描隧道显微镜/光谱学和密度泛函理论计算。在尖端诱导去除连接到两个相邻硼原子的 Si 原子后，出现清晰的 Kondo 共振峰，并被 12 T 的外加磁场进一步分裂。这种磁性状态可以沿 GNR 的纵轴传递依次去除 Si 原子。

更新日期：2022-06-22

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