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

1 Scopus citations

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	2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781957171050
State	Published - 2022
Externally published	Yes
Event	2022 Conference on Lasers and Electro-Optics, CLEO 2022 - San Jose, United States Duration: May 15 2022 → May 20 2022

Publication series

Name	2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings

Conference

Conference	2022 Conference on Lasers and Electro-Optics, CLEO 2022
Country/Territory	United States
City	San Jose
Period	5/15/22 → 5/20/22

ASJC Scopus subject areas

Instrumentation
Spectroscopy
Biomedical Engineering
Electrical and Electronic Engineering
Management, Monitoring, Policy and Law
Materials Science (miscellaneous)
Acoustics and Ultrasonics
Atomic and Molecular Physics, and Optics

Cite this

Lin, Y., Chan, Y. H., Lee, W., Lu, L. S., Li, Z., Chang, W. H., Shih, C. K., Kaindl, R. A., Louie, S. G., & Lanzara, A. (2022). Exciton-Driven Ultrafast Enhancement of Quasiparticle Bandgap and Effective Mass in Monolayer MoS2. In 2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings Article FTu4B.1 (2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings). Institute of Electrical and Electronics Engineers Inc..

Exciton-Driven Ultrafast Enhancement of Quasiparticle Bandgap and Effective Mass in Monolayer MoS2. / Lin, Yi; Chan, Yang Hao; Lee, Woojoo et al.
2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2022. FTu4B.1 (2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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 2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings., FTu4B.1, 2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings, Institute of Electrical and Electronics Engineers Inc., 2022 Conference on Lasers and Electro-Optics, CLEO 2022, San Jose, United States, 5/15/22.

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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",

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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

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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:85139942387

T3 - 2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings

BT - 2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 2022 Conference on Lasers and Electro-Optics, CLEO 2022

Y2 - 15 May 2022 through 20 May 2022

ER -

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

Abstract

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Conference

ASJC Scopus subject areas

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