• 文献标题:   Spin filtering and large magnetoresistance behaviors in carbon chain-zigzag graphene nanoribbon nanojunctions
  • 文献类型:   Article
  • 作  者:   DENG XQ, ZHANG ZH, TANG GP, FAN ZQ, YANG CH
  • 作者关键词:   spin filtering, magnetoresistance, graphene
  • 出版物名称:   PHYSICS LETTERS A
  • ISSN:   0375-9601 EI 1873-2429
  • 通讯作者地址:   Changsha Univ Sci Technol
  • 被引频次:   15
  • DOI:   10.1016/j.physleta.2014.03.036
  • 出版年:   2014

▎ 摘  要

Using the non-equilibrium Green's function method combined with the density functional theory, we investigate the electron and spin transport properties of carbon chains covalently connected with zigzag-edged graphene electrodes at finite bias with the parallel (P) and antiparallel (AP) magnetism configurations. When two zigzag-edged graphene electrodes are H2-ZGNR--H structures, spin filtering effect can be realized only with AP magnetism configuration. While one electrode is replaced with the H-ZGNR-H structure, we observe a dual spin filtering effect with above two magnetism configurations. But the spin transport properties of carbon chains can also be affected by the linking way of the carbon chain ends. Deeper analyses show that the spin-related properties are related to the electrodes, magnetism configurations, and the connection structure between electrodes and carbon chains. (C) 2014 Elsevier B.V. All rights reserved.