We study theoretically the nonequilibrium exciton transport in monolayer transition metal dichalcogenides. We consider the situation where excitons interact with nonequilibrium phonons, e.g., under the conditions of localized excitation where a "hot spot" is formed. We develop the theory of the exciton drag by the phonons and analyze in detail the regimes of diffusive propagation of phonons and ballistic propagation of phonons where the phonon wind is generated. We demonstrate that a halolike spatial distribution of excitons akin observed in [Phys. Rev. Lett. 120, 207401 (2018)PRLTAO0031-900710.1103/PhysRevLett.120.207401] can result from the exciton drag by nonequilibrium phonons.

Original languageEnglish
Article number045426
Number of pages11
JournalPhysical Review B
Volume100
Issue number4
DOIs
StatePublished - 30 Jul 2019

    Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

    Research areas

  • TRANSPORT

ID: 49044396