Floquet topological phases on a honeycomb lattice using elliptically polarized light

Ranjani Seshadri

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


We study the effect of driving a two-dimensional honeycomb system out of equilibrium using an elliptically polarized light as a time-dependent perturbation. In particular, we try to understand the topological phase diagram of this driven system when the external drive is a vector potential given by A ( t ) = ( A 0 x cos ( Ω t ) , A 0 y cos ( Ω t + ϕ 0 ) ) . These topological phases are characterized by the Floquet Chern number which, in each of these phases, is related to the number of robust edge modes on a nanoribbon. We show that varying the ratio A 0x /A 0y of the external drive is a possible way to take the system from a trivial to a topological phase and vice versa.

Original languageEnglish
Article number024002
JournalMaterials Research Express
Issue number2
StatePublished - 1 Feb 2023


  • Floquet
  • graphene
  • honeycomb
  • topological

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Metals and Alloys


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