• 文献标题:   First-principles study of carrier-induced ferromagnetism in bilayer and multilayer zigzag graphene nanoribbons
  • 文献类型:   Article
  • 作  者:   SAWADA K, ISHII F, SAITO M
  • 作者关键词:  
  • 出版物名称:   APPLIED PHYSICS LETTERS
  • ISSN:   0003-6951 EI 1077-3118
  • 通讯作者地址:   Kanazawa Univ
  • 被引频次:   4
  • DOI:   10.1063/1.4870766
  • 出版年:   2014

▎ 摘  要

We studied magnetism in bilayer and multilayer zigzag graphene nanoribbons (ZGNRs) through first-principles density functional theory calculations. We found that the magnetic ground state of bilayer ZGNRs is the C-type antiferromagnetic (AFM) state, which is the AFM order between intraplane-edge carbon atoms and ferromagnetic (FM) order between interplane edge carbon atoms. In the cases of infinitely stacked multilayer ZGNRs, i.e., zigzag graphite nanoribbons, the C-type AFM state is also the most stable. By carrier doping, we found that the magnetic ground state changed from the C-AFM state to the FM state and, thus, realized two-dimensional FM surface (edge) states of graphite with a metallic conductivity. (C) 2014 AIP Publishing LLC.