• 文献标题:   Effects of Strain on Notched Zigzag Graphene Nanoribbons
  • 文献类型:   Article
  • 作  者:   BALDWIN J, HANCOCK Y
  • 作者关键词:   graphene nanoribbon, hubbard model, spintransport, itinerant magnetism, strain effect, nanotechnology
  • 出版物名称:   CRYSTALS
  • ISSN:   2073-4352
  • 通讯作者地址:   Univ York
  • 被引频次:   4
  • DOI:   10.3390/cryst3010038
  • 出版年:   2013

▎ 摘  要

The combined effects of an asymmetric (square or V-shaped) notch and uniaxial strain are studied in a zigzag graphene nanoribbon (ZGNR) device using a generalized tight-binding model. The spin-polarization and conductance-gap properties, calculated within the Landauer-Buttiker formalism, were found to be tunable for uniaxial strain along the ribbon-length and ribbon-width for an ideal ZGNR and square (V-shaped) notched ZGNR systems. Uniaxial strain along the ribbon-width for strains >= 10% initiated significant notch-dependent reductions to the conduction-gap. For the V-shaped notch, such strains also induced spin-dependent changes that result, at 20% strain, in a semi-conductive state and metallic state for each respective spin-type, thus demonstrating possible quantum mechanisms for spin-filtration.