Exciton-Driven Ultrafast Enhancement of Quasiparticle Bandgap and Effective Mass in Monolayer MoS2

Yi Lin, Yang Hao Chan, Woojoo Lee, Li Syuan Lu, Zhenglu Li, Wen Hao Chang, Chih Kang Shih, Robert A. Kaindl, Steven G. Louie, Alessandra Lanzara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We report an ultrafast increase of the quasi-particle bandgap and effective mass in photoexcited monolayer MoS2 on HOPG, utilizing extreme-ultraviolet time- and angle-resolved photoemission spectroscopy (XUV-trARPES). Combined with theoretical models, we attribute these compelling band renormalizations to the excitonic effects from bound electron-hole pairs.

Original languageEnglish (US)
Title of host publicationCLEO
Subtitle of host publicationQELS_Fundamental Science, QELS 2022
PublisherOptica Publishing Group (formerly OSA)
ISBN (Electronic)9781557528209
StatePublished - 2022
EventCLEO: QELS_Fundamental Science, QELS 2022 - San Jose, United States
Duration: May 15 2022May 20 2022

Publication series

NameOptics InfoBase Conference Papers

Conference

ConferenceCLEO: QELS_Fundamental Science, QELS 2022
Country/TerritoryUnited States
CitySan Jose
Period5/15/225/20/22

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Mechanics of Materials

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