4.8 Article

Doping Graphene with Substitutional Mn

期刊

ACS NANO
卷 15, 期 3, 页码 5449-5458

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acsnano.1c00139

关键词

graphene; doping; manganese; electronic structure; magnetism; ion implantation

资金

  1. KU Leuven
  2. FWO Vlaanderen
  3. EU Horizon 2020 Framework (MagDirac project) [796940]
  4. Agency for Innovation and Entrepreneurship (VLAIO)
  5. Red Espanola de Supercomputacion (RES) [FI2020-2-0034]

向作者/读者索取更多资源

The study demonstrates the successful incorporation of substitutional Mn atoms in high-quality epitaxial graphene using ultralow-energy ion implantation. The position of substitutional Mn atoms with respect to the Moire superstructure and the carbon sublattice, as well as their slight displacement towards the Cu surface in the out-of-plane direction, were characterized. The doped graphene retains the Dirac-like band structure of pristine graphene on Cu(111), making it an ideal system for studying the interplay between local magnetic moments and Dirac electrons.
We report the incorporation of substitutional Mn atoms in high-quality, epitaxial graphene on Cu(111), using ultralow-energy ion implantation. We characterize in detail the atomic structure of substitutional Mn in a single carbon vacancy and quantify its concentration. In particular, we are able to determine the position of substitutional Mn atoms with respect to the Moire superstructure (i.e., local graphene-Cu stacking symmetry) and to the carbon sublattice; in the out-of-plane direction, substitutional Mn atoms are found to be slightly displaced toward the Cu surface, that is, effectively underneath the graphene layer. Regarding electronic properties, we show that graphene doped with substitutional Mn to a concentration of the order of 0.04%, with negligible structural disorder (other than the Mn substitution), retains the Dirac-like band structure of pristine graphene on Cu(111), making it an ideal system in which to study the interplay between local magnetic moments and Dirac electrons. Our work also establishes that ultralow-energy ion implantation is suited for substitutional magnetic doping of graphene. Given the flexibility, reproducibility, and scalability inherent to ion implantation, our work creates numerous opportunities for research on magnetic functionalization of graphene and other two-dimensional materials.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.8
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据