• 文献标题:   Quasiparticle interference and Landau level spectroscopy in graphene in the presence of a strong magnetic field
  • 文献类型:   Article
  • 作  者:   BISWAS RR, BALATSKY A
  • 作者关键词:   electronic density of state, graphene, landau level, quasiparticle, scanning tunnelling spectroscopy
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   1098-0121
  • 通讯作者地址:   Harvard Univ
  • 被引频次:   5
  • DOI:   10.1103/PhysRevB.80.081412
  • 出版年:   2009

▎ 摘  要

We present a calculation of the modulation in the local density of electronic states caused by an impurity in graphene in the presence of an external magnetic field. We focus on the spatial Fourier transform (FT) of this modulation around the impurity. The FT due to the low-energy quasiparticles is found to be nonzero over the reciprocal lattice (with a three-site basis) corresponding to graphene. At these lattice spots the FT exhibits well-defined features at wave vectors that are multiples of the inverse cyclotron orbit diameter and is cut off at the wave vector corresponding to the energy of observation. Scanning tunneling spectroscopy on graphene and the energy-resolved FT fingerprint obtained therefrom may be used to observe the quasiparticle interference of Dirac particles in graphene in the presence of magnetic field.