• 文献标题:   Manipulation of Spin Polarization in Boron-Substituted Graphene Nanoribbons
  • 文献类型:   Article, Early Access
  • 作  者:   SUN KW, SILVEIRA OJ, SAITO S, SAGISAKA K, YAMAGUCHI S, FOSTER AS, KAWAI S
  • 作者关键词:   boron substituted graphene nanoribbon, silicon atom, ausix layer, scanning tunneling microscopy, spectroscopy, spin polarization, kondo resonance
  • 出版物名称:   ACS NANO
  • ISSN:   1936-0851 EI 1936-086X
  • 通讯作者地址:  
  • 被引频次:   5
  • DOI:   10.1021/acsnano.2c04563 EA JUN 2022
  • 出版年:   2022

▎ 摘  要

The design of magnetic topological states due to spin polarization in an extended pi 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 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.