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CONDENSED-MATTER PHYSICS

Excitons surf the waves

Directional control of the diffusion of excitons is desired for excitonic devices, but being neutrally charged they can’t be transported by applying a bias voltage as for conventional electronic transport. It is now shown that surface acoustic waves can direct the flux of excitons over micrometre distances, even at room temperature.

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Fig. 1: Schematic representation of a device for surface acoustic wave-driven transport of excitons in a WSe2 monolayer.

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Correspondence to Jorge Quereda or Andres Castellanos-Gomez.

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Quereda, J., Castellanos-Gomez, A. Excitons surf the waves. Nat. Photon. 16, 179–180 (2022). https://doi.org/10.1038/s41566-022-00964-6

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