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

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 proceeding › Conference 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 language	English (US)
Title of host publication	CLEO
Subtitle of host publication	QELS_Fundamental Science, QELS 2022
Publisher	Optica Publishing Group (formerly OSA)
ISBN (Electronic)	9781557528209
State	Published - 2022
Externally published	Yes
Event	CLEO: QELS_Fundamental Science, QELS 2022 - San Jose, United States Duration: May 15 2022 → May 20 2022

Publication series

Name	Optics InfoBase Conference Papers

Conference

Conference	CLEO: QELS_Fundamental Science, QELS 2022
Country/Territory	United States
City	San Jose
Period	5/15/22 → 5/20/22

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Mechanics of Materials

Cite this

Lin, Y, Chan, YH, Lee, W, Lu, LS, Li, Z, Chang, WH, Shih, CK, Kaindl, RA, Louie, SG & Lanzara, A 2022, Exciton-Driven Ultrafast Enhancement of Quasiparticle Bandgap and Effective Mass in Monolayer MoS₂. in CLEO: QELS_Fundamental Science, QELS 2022., FTu4B.1, Optics InfoBase Conference Papers, Optica Publishing Group (formerly OSA), CLEO: QELS_Fundamental Science, QELS 2022, San Jose, United States, 5/15/22.

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title = "Exciton-Driven Ultrafast Enhancement of Quasiparticle Bandgap and Effective Mass in Monolayer MoS2",

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.",

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

note = "Publisher Copyright: {\textcopyright} Optica Publishing Group 2022, {\textcopyright} 2022 The Author(s); CLEO: QELS_Fundamental Science, QELS 2022 ; Conference date: 15-05-2022 Through 20-05-2022",

year = "2022",

language = "English (US)",

series = "Optics InfoBase Conference Papers",

publisher = "Optica Publishing Group (formerly OSA)",

booktitle = "CLEO",

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T1 - Exciton-Driven Ultrafast Enhancement of Quasiparticle Bandgap and Effective Mass in Monolayer MoS2

AU - Lin, Yi

AU - Chan, Yang Hao

AU - Lee, Woojoo

AU - Lu, Li Syuan

AU - Li, Zhenglu

AU - Chang, Wen Hao

AU - Shih, Chih Kang

AU - Kaindl, Robert A.

AU - Louie, Steven G.

AU - Lanzara, Alessandra

PY - 2022

Y1 - 2022

N2 - 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.

AB - 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.

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M3 - Conference contribution

AN - SCOPUS:85136784618

T3 - Optics InfoBase Conference Papers

BT - CLEO

PB - Optica Publishing Group (formerly OSA)

T2 - CLEO: QELS_Fundamental Science, QELS 2022

Y2 - 15 May 2022 through 20 May 2022

ER -