• 文献标题:   Electronic band gaps and transport properties in aperiodic bilayer graphene superlattices of Thue-Morse sequence
  • 文献类型:   Article
  • 作  者:   LI CA, CHENG HM, CHEN RF, MA TX, WANG LG, SONG Y, LIN HQ
  • 作者关键词:  
  • 出版物名称:   APPLIED PHYSICS LETTERS
  • ISSN:   0003-6951 EI 1077-3118
  • 通讯作者地址:   Beijing Normal Univ
  • 被引频次:   18
  • DOI:   10.1063/1.4826643
  • 出版年:   2013

▎ 摘  要

We investigate electronic band structure and transport properties in bilayer graphene superlattices of Thue-Morse sequence. It is interesting to find that the zero-(k) over bar gap center is sensitive to interlayer coupling t', and the centers of all gaps shift versus t' at a linear way. Extra Dirac points may emerge at k(y) not equal 0, and when the extra Dirac points are generated in pairs, the electronic conductance obeys a diffusive law, and the Fano factor tends to be 1/3 as the order of Thue-Morse sequence increases. Our results provide a flexible and effective way to control the transport properties in graphene. (C) 2013 AIP Publishing LLC.