2021
DOI: 10.48550/arxiv.2102.03769
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Observation of Dynamic Screening in the Excited Exciton States in Multi-layered MoS$_2$

Manobina Karmakar,
Sayantan Bhattacharya,
Subhrajit Mukherjee
et al.

Abstract: Excitonic resonance and binding energies can be altered by controlling the environmental screening of the attractive Coulomb potential. Although this screening response is often assumed to be static, the time evolution of the excitonic quasiparticles manifests a frequency-dependence in its Coulomb screening efficacy. In this letter, we investigate a ground (1s) and first excited exciton state (2s) in a multi-layered transition metal dichalcogenide (MoS2) upon ultrafast photo-excitation. We explore the dynamic … Show more

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