Nature Communications (Aug 2019)

InSe as a case between 3D and 2D layered crystals for excitons

  • T. V. Shubina,
  • W. Desrat,
  • M. Moret,
  • A. Tiberj,
  • O. Briot,
  • V. Yu. Davydov,
  • A. V. Platonov,
  • M. A. Semina,
  • B. Gil

DOI
https://doi.org/10.1038/s41467-019-11487-0
Journal volume & issue
Vol. 10, no. 1
pp. 1 – 8

Abstract

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The optical properties of layered InSe aren’t fully understood. Here, the authors observe the exciton, biexciton, and P-band of exciton-exciton scattering in the photoluminescence spectrum of InSe, and calculate an exciton binding energy value of ≥20 meV, markedly higher than the currently accepted 14 meV.