• 文献标题:   The effects of spin-filter and negative differential resistance on Fe-substituted zigzag graphene nanoribbons
  • 文献类型:   Article
  • 作  者:   YAN SL, LONG MQ, ZHANG XJ, XU H
  • 作者关键词:   zigzag graphene nanoribbon, fesubstituted, spinfilter effect, negative differential resistance
  • 出版物名称:   PHYSICS LETTERS A
  • ISSN:   0375-9601 EI 1873-2429
  • 通讯作者地址:   Cent S Univ
  • 被引频次:   31
  • DOI:   10.1016/j.physleta.2014.01.042
  • 出版年:   2014

▎ 摘  要

Using the first-principle calculations, we investigate the spin-dependent transport properties of Fesubstituted zigzag graphene nanoribbons (ZGNRs). The substituted ZGNRs with single or double Fe atoms, distributing symmetrically or asymmetrically on both edges, are considered. Our results show Fe-substitution can significantly change electronic transport of ZGNRs, and the spin-filter effect and negative differential resistance (NDR) can be observed. We propose that the distribution of the electronic spin-states of ZGNRs can be modulated by the substituted Fe and results in the spin-polarization, and meanwhile the change of the delocalization of the frontier molecular orbitals at different bias may be responsible for the NDR behavior. (C) 2014 Elsevier B.V. All rights reserved.