• 文献标题:   The enhanced optical conductivity for zigzag-edge graphene nanoribbons with applied gate voltage
  • 文献类型:   Article
  • 作  者:   ZHU WH, DING GH, DONG B
  • 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:   Shanghai Jiao Tong Univ
  • 被引频次:   10
  • DOI:   10.1063/1.3692171
  • 出版年:   2012

▎ 摘  要

We study the optical absorption properties of zigzag-edge graphene nanoribbons (ZGNRs) taking into account the Coulomb interaction effect in the Hartree-Fock approximation. The optical selection rules for the incident light polarized along the longitudinal and transverse directions are investigated. We demonstrate that the excitations from the edge states are essential for the optical properties of ZGNRs in the neutral case. With the chemical potential shifting away from the Dirac point, the optical conductivity is drastically enhanced in the low frequency region for the transverse polarized incident light. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3692171]