• 文献标题:   Mapping of strained graphene into one-dimensional Hamiltonians: Quasicrystals and modulated crystals
  • 文献类型:   Article
  • 作  者:   NAUMIS GG, ROMANTABOADA P
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   1098-0121 EI 1550-235X
  • 通讯作者地址:   Univ Nacl Autonoma Mexico
  • 被引频次:   18
  • DOI:   10.1103/PhysRevB.89.241404
  • 出版年:   2014

▎ 摘  要

The electronic properties of graphene under any arbitrary uniaxial strain field are obtained by an exact mapping of the corresponding tight-binding Hamiltonian into an effective one-dimensional modulated chain. For a periodic modulation, the system displays a rich behavior, including quasicrystals and modulated crystals with a complex spectrum, including gaps and peaks at the Fermi energy and localization transitions. All these features are explained by the incommensurate or commensurate nature of the potential, which leads to a dense filling by diffraction spots of the reciprocal space in the former case. The essential features of strain are made specially clear by analyzing a special momenta that uncouples the model into dimers.