Nature Communications (Jun 2022)

Optical control of exciton spin dynamics in layered metal halide perovskites via polaronic state formation

  • Sean A. Bourelle,
  • Franco V. A. Camargo,
  • Soumen Ghosh,
  • Timo Neumann,
  • Tim W. J. van de Goor,
  • Ravichandran Shivanna,
  • Thomas Winkler,
  • Giulio Cerullo,
  • Felix Deschler

DOI
https://doi.org/10.1038/s41467-022-30953-w
Journal volume & issue
Vol. 13, no. 1
pp. 1 – 8

Abstract

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Spintronic devices will require long spin lifetimes, but the effect of exciton-lattice coupling on spin lifetime in metal-halide perovskites is not well understood. Here, the authors find a 100-fold increase in the lifetime of exciton spins in a 2D perovskite by exciting with excess energy, resulting from strong coupling between excitons and optically excited phonons.