• 文献标题:   Spin confinement in the superlattices of graphene ribbons
  • 文献类型:   Article
  • 作  者:   TOPSAKAL M, SEVINCLI H, CIRACI S
  • 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:   Bilkent Univ
  • 被引频次:   58
  • DOI:   10.1063/1.2919525
  • 出版年:   2008

▎ 摘  要

Based on first-principles calculations, we showed that repeated heterostructures of zigzag graphene nanoribbons of different widths form multiple quantum well structures. Edge states of specific spin directions can be confined in these wells. The electronic and magnetic state of the ribbon can be modulated in real space. In specific geometries, the absence of reflection symmetry causes the magnetic ground state of whole heterostructure to change from antiferromagnetic to ferrimagnetic. These quantum structures of different geometries provide unique features for spintronic applications. (c) 2008 American Institute of Physics.