Abstract

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.

Highlights

  • The strong dependence of τrise on the lattice temperature strongly suggests that this relaxation process is mediated by phonons

  • We find that spinpolarized carriers scatter from upper to lower conduction band by reversing their spin orientation on a sub-ps timescale

  • In two-dimensional Transition Metal Dichalcogenides (TMDs) interactions with light are dominated by strongly bounded excitons due to the low-dimensional quantum confinement[1]

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Summary

Introduction

The strong dependence of τrise on the lattice temperature strongly suggests that this relaxation process is mediated by phonons (right panel of Fig. 1). We use helicity-resolved transient absorption spectroscopy to track intravalley scattering dynamics in monolayer WS2.

Results
Conclusion
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