• 文献标题:   Localization effects in graphene nanoribbons with quasiperiodic hopping modulation
  • 文献类型:   Article
  • 作  者:   DA SILVA JR, BARBOSA ALR, PEREIRA LFC
  • 作者关键词:   electronic transport, graphene, nanoribbon, superlattice, hopping modulation
  • 出版物名称:   MICRO NANOSTRUCTURES
  • ISSN:  
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1016/j.micrna.2022.207295 EA JUN 2022
  • 出版年:   2022

▎ 摘  要

Graphene nanoribbons present remarkable electronic transport properties which can be tailored to specific applications. We consider a quasiperiodic modulation in the electronic hopping of metallic armchair and zigzag graphene nanoribbons, originating a Fibonacci superlattice with two possible hopping parameters. The electronic conductance for various Fibonacci generations is calculated via the recursive Green???s function method. We observe that a quasiperiodic hopping modulation opens a conductance gap at the Fermi level of armchair nanoribbons, leading to a strong electronic localization regime. The localization length initially increases with Fibonacci generation and saturates for high order generations. Considering an energy slightly above the Fermi level, we obtain similar results for the armchair nanoribbon, while the zigzag nanoribbon eventually enters the localization regime for high order Fibonacci generations. Our results demonstrate that a quasiperiodic hopping modulation is a viable way to control the electronic transport in graphene nanoribbons, widening its range of possible application in nanoelectronic devices.