Jinhua Hong 1, Ryosuke Senga 1, Thomas Pichler 2, and Kazu Suenaga 1,* Phys. Rev. Lett. 124, 087401 – Published 25 February, 2020. DOI: https://doi.org/10.1103/PhysRevLett.124.087401. Excitons, as bound electron-hole paired quasiparticle, play an essential role in the energy transport in the optical-electric properties of semiconductors. More @Wikipedia
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