• 文献标题:   Atomic Scale Investigation of a Graphene Nano-ribbon Based High Efficiency Spin Valve
  • 文献类型:   Article
  • 作  者:   SUN QQ, WANG LH, YANG W, ZHOU P, WANG PF, DING SJ, ZHANG DW
  • 作者关键词:  
  • 出版物名称:   SCIENTIFIC REPORTS
  • ISSN:   2045-2322
  • 通讯作者地址:   Fudan Univ
  • 被引频次:   11
  • DOI:   10.1038/srep02921
  • 出版年:   2013

▎ 摘  要

Graphene nanoribbons based electronic devices present many interesting physical properties. We designed and investigated the spin-dependent electron transport of a device configuration, which is easy to be fabricated, with an oxygen-terminated ZGNR central scatter region between two hydrogen-terminated ZGNR electrodes. According to the analysis based on non-equilibrium Green's function and density functional theory, the proposed device could maintain its good spin-filter performance (80% to 99%) and have a stable magneto resistance value up to 10(5)%. The spin dependent electron transmission spectrum and space-resolve density of states are employed to investigate the physical origin of the spin-polarized current and magneto resistance.