• 文献标题:   Chiral quasiparticle local density of states maps in graphene
  • 文献类型:   Article
  • 作  者:   PEREGBARNEA T, MACDONALD AH
  • 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 Texas Austin
  • 被引频次:   23
  • DOI:   10.1103/PhysRevB.78.014201
  • 出版年:   2008

▎ 摘  要

We present a theory of momentum-space local density of states (LDOS) maps N(q,omega) in graphene. The LDOS map has both intravalley contributions centered near zero momentum and reciprocal-lattice vectors and intervalley contributions displaced by the wave vector K-'-K which connects graphene's two distinct Dirac points. Using graphene's Dirac equation chiral quasiparticle continuum model, we obtain analytic results which explain the qualitative differences between these two LDOS-map features. We comment on the sensitivity of both N(q,omega) features to the mix of atomic length scale and smooth disorder sources present in a particular graphene sample.