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  • 文献标题:   Bipolar spin-filtering effect in B- or N-doped zigzag graphene nanoribbons with asymmetric edge hydrogenation
  • 文献类型:   Article
  • 作　　者:   WANG LH, ZHANG ZZ, ZHAO JG, DING BJ, GUO Y, JIN C
  • 作者关键词:   density functional theory, nonequilibrium green s function, graphene, spinfiltering
  • 出版物名称:   PHYSICS LETTERS A
  • ISSN:   0375-9601 EI 1873-2429
  • 通讯作者地址:   Shanxi Datong Univ
  • 被引频次:   8
  • DOI:   10.1016/j.physleta.2015.09.020
  • 出版年:   2015

▎ 摘　　要

The spin transport properties of zigzag graphene nanoribbon (ZGNR) hetero-junctions, in which ZGNR electrodes are doped with B or N atoms, are investigated based on spin-polarized density functional theory and non-equilibrium Green's function. ZGNRs are C-H2 bonded at one edge and C-H bonded at the other edge to form asymmetric edge hydrogenation. The spin-polarized currents of ZGNR-based nanodevices with an odd or even number of the zigzag-shaped chains show a perfect bipolar spin-filtering effect on parallel and anti-parallel magnetic configurations. This study provides insights into the design of high-performance graphene-based spin filters. (C) 2015 Elsevier B.V. All rights reserved.