EPJ Web of Conferences (Jan 2019)

Real-time observation of the intravalley spin-flip process in single-layer WS2

  • Wang Zilong,
  • Molina-Sanchez Alejandro,
  • Altmann Patrick,
  • Sangalli Davide,
  • De Fazio Domenico,
  • Soavi Giancarlo,
  • Sassi Ugo,
  • Bottegoni Federico,
  • Ciccacci Franco,
  • Finazzi Marco,
  • Wirtz Ludger,
  • Ferrari Andrea,
  • Marini Andrea,
  • Cerullo Giulio,
  • Dal Conte Stefano

DOI
https://doi.org/10.1051/epjconf/201920505012
Journal volume & issue
Vol. 205
p. 05012

Abstract

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We use helicity-resolved transient absorption spectroscopy to track intravalley scattering dynamics in monolayer WS2. We find that spin-polarized carriers scatter from upper to lower conduction band by reversing their spin orientation on a sub-ps timescale.