2014/06/30 by Hossein Dehghani, Takashi Oka, Aditi Mitra · 3 citations
Mathematics · Physics and Astronomy · #Dissipative system #Distribution function #Electron #Fermion #Floquet theory #Mathematics #Maxwell–Boltzmann distribution #Non-equilibrium thermodynamics #Physics #Quantum and electron transport phenomena #Quantum many-body systems #Quantum mechanics #Topological Materials and Phenomena #Topology (electrical circuits) #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.90.195429
published as Phys. Rev. B 90, 195429 (2014) · 10 pages, 5 figures
openalex publication_date 2014/11/20 · arxiv created 2014/11/23 · arxiv updated 2015/06/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Motivated by recent pump-probe spectroscopies, we study the effect of phonon dissipation and potential cooling on the nonequilibrium distribution function in a Floquet topological state. To this end, we apply a Floquet kinetic equation approach to study two-dimensional Dirac fermions irradiated by a circularly polarized laser, a system which is predicted to be in a laser-induced quantum Hall state. We find that the initial electron distribution shows an anisotropy with momentum-dependent spin textures whose properties are controlled by the switching-on protocol of the laser. The phonons then smoothen this out, leading to a nontrivial isotropic nonequilibrium distribution which has no memory of the initial state and initial switch-on protocol, and yet is distinct from a thermal state. An analytical expression for the distribution at the Dirac point is obtained that is relevant for observing quantized transport.