• 文献标题:   Band Gap Tuning of Armchair Graphene Nanoribbons by Using Antidotes
  • 文献类型:   Article
  • 作  者:   ZOGHI M, GOHARRIZI AY, SAREMI M
  • 作者关键词:   antidote, armchair graphene nanoribbon, band gap tuning, super lattice, tightbinding
  • 出版物名称:   JOURNAL OF ELECTRONIC MATERIALS
  • ISSN:   0361-5235 EI 1543-186X
  • 通讯作者地址:   Shahid Beheshti Univ
  • 被引频次:   25
  • DOI:   10.1007/s11664-016-4940-4
  • 出版年:   2017

▎ 摘  要

The electronic properties of armchair graphene nanoribbons (AGNRs) can be changed by creating antidotes within the pristine ribbons and producing antidote super lattice AGNRs (ASL-AGNRs). In the present work, band gap tuning of ASL-AGNRs is investigated by varying the width of ribbons (d(W)) and the distance between antidotes (d(L)) for five different antidote topologies. Numerical tight-binding model is applied to obtain the band structure of the ribbons. Based on our results, it is found that the band gap of ASL-AGNRs can be increased or decreased in different cases. Furthermore, changing the width of ribbons generally results in more predictable band gap profiles compared to the variation of distance between antidotes. Consequently, by opting appropriate antidote topologies and dimensional parameters (d(W) and d(L)), it is possible to gain a desired band gap size. This can be considered as an alternative solution in design of electronic and optoelectronic devices where tunable band gap values are needed.