• 文献标题:   Graphene superlattices in strong circularly polarized fields: Chirality, Berry phase, and attosecond dynamics
  • 文献类型:   Article
  • 作  者:   KELARDEH HK, APALKOV V, STOCKMAN MI
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   2469-9950 EI 2469-9969
  • 通讯作者地址:   Georgia State Univ
  • 被引频次:   8
  • DOI:   10.1103/PhysRevB.96.075409
  • 出版年:   2017

▎ 摘  要

We propose and theoretically explore states of graphene superlattices with relaxed P and T symmetries created by strong circularly polarized ultrashort pulses. The conduction-band electron distribution in the reciprocal space forms an interferogram with discontinuities related to topological (Berry) fluxes at the Dirac points. This can be studied using time-and angle-resolved photoemission spectroscopy (TR-ARPES). Our findings hold promise for control and observation of ultrafast electron dynamics in topological solids and may be applied to petahertz-scale information processing.