• 文献标题:   Zitterbewegung near new Dirac points in graphene superlattices
  • 文献类型:   Article
  • 作  者:   LUAN JL, LI SY, MA TX, WANG LG
  • 作者关键词:   zitterbewegung, dirac point, graphene superlattice
  • 出版物名称:   JOURNAL OF PHYSICSCONDENSED MATTER
  • ISSN:   0953-8984 EI 1361-648X
  • 通讯作者地址:   Beijing Normal Univ
  • 被引频次:   1
  • DOI:   10.1088/1361-648X/aadbe0
  • 出版年:   2018

▎ 摘  要

New Dirac points may appear when periodic potentials are applied to graphene, and there are many interesting effects near them. Here we investigate the Zitterbewegung effect of fermions described by a Gaussian wave packet in graphene superlattice near these points. The Zitterbewegung near different Dirac points has similar characteristics, while fermions near new ones have different group velocities in both x- and y-direction, which causes the different properties of the Zitterbewegung near them. We also investigate the Zitterbewegung effect influenced by multi Dirac points, and get the evolution with changing potential. Our results suggest that graphene superlattice may provide an appropriate system to study the Zitterbewegung effect near new Dirac points experimentally.