• 文献标题:   Strong magnetic anisotropy of chemically bound Co dimers in a graphene sheet
  • 文献类型:   Article
  • 作  者:   KANDPAL HC, KOEPERNIK K, RICHTER M
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   2469-9950 EI 2469-9969
  • 通讯作者地址:   IFW Dresden eV
  • 被引频次:   14
  • DOI:   10.1103/PhysRevB.86.235430
  • 出版年:   2012

▎ 摘  要

The magnetism of cobalt atoms and dimers bound by single vacancies in a graphene sheet is investigated by means of relativistic density functional calculations. In both cases, local magnetic moments are formed despite strong chemical binding. While orbital magnetism is suppressed in the Co atoms, magnetic bistability with an anisotropy barrier of about 50 meV is possible in the chemically bound Co dimers. The feasibility of their preparation is demonstrated and a general construction principle for similar (sub-)nanometer size magnets is proposed. DOI: 10.1103/PhysRevB.86.235430