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Article: Phonon-exciton Interactions in WSe2 under a quantizing magnetic field

TitlePhonon-exciton Interactions in WSe2 under a quantizing magnetic field
Authors
KeywordsDARK EXCITONS
VALLEY
SPIN
Issue Date2020
PublisherNature Research (part of Springer Nature): Fully open access journals. The Journal's web site is located at http://www.nature.com/ncomms/index.html
Citation
Nature Communications, 2020, v. 11 n. 1, p. 3104:1-3104:7 How to Cite?
AbstractStrong many-body interaction in two-dimensional transitional metal dichalcogenides provides a unique platform to study the interplay between different quasiparticles, such as prominent phonon replica emission and modified valley-selection rules. A large out-of-plane magnetic field is expected to modify the exciton-phonon interactions by quantizing excitons into discrete Landau levels, which is largely unexplored. Here, we observe the Landau levels originating from phonon-exciton complexes and directly probe exciton-phonon interaction under a quantizing magnetic field. Phonon-exciton interaction lifts the inter-Landau-level transition selection rules for dark trions, manifested by a distinctively different Landau fan pattern compared to bright trions. This allows us to experimentally extract the effective mass of both holes and electrons. The onset of Landau quantization coincides with a significant increase of the valley-Zeeman shift, suggesting strong many-body effects on the phonon-exciton interaction. Our work demonstrates monolayer WSe2 as an intriguing playground to study phonon-exciton interactions and their interplay with charge, spin, and valley.
Persistent Identifierhttp://hdl.handle.net/10722/285490
ISSN
2019 Impact Factor: 12.121
2015 SCImago Journal Rankings: 6.539
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLi, ZP-
dc.contributor.authorWang, TM-
dc.contributor.authorMiao, SN-
dc.contributor.authorLi, YM-
dc.contributor.authorLu, ZG-
dc.contributor.authorJin, CH-
dc.contributor.authorLian, Z-
dc.contributor.authorMeng, YZ-
dc.contributor.authorBlei, M-
dc.contributor.authorTaniguchi, T-
dc.contributor.authorWatanabe, K-
dc.contributor.authorTongay, S-
dc.contributor.authorYao, W-
dc.contributor.authorSmirnov, D-
dc.contributor.authorZhang, CW-
dc.contributor.authorShi, SF-
dc.date.accessioned2020-08-18T03:53:55Z-
dc.date.available2020-08-18T03:53:55Z-
dc.date.issued2020-
dc.identifier.citationNature Communications, 2020, v. 11 n. 1, p. 3104:1-3104:7-
dc.identifier.issn2041-1723-
dc.identifier.urihttp://hdl.handle.net/10722/285490-
dc.description.abstractStrong many-body interaction in two-dimensional transitional metal dichalcogenides provides a unique platform to study the interplay between different quasiparticles, such as prominent phonon replica emission and modified valley-selection rules. A large out-of-plane magnetic field is expected to modify the exciton-phonon interactions by quantizing excitons into discrete Landau levels, which is largely unexplored. Here, we observe the Landau levels originating from phonon-exciton complexes and directly probe exciton-phonon interaction under a quantizing magnetic field. Phonon-exciton interaction lifts the inter-Landau-level transition selection rules for dark trions, manifested by a distinctively different Landau fan pattern compared to bright trions. This allows us to experimentally extract the effective mass of both holes and electrons. The onset of Landau quantization coincides with a significant increase of the valley-Zeeman shift, suggesting strong many-body effects on the phonon-exciton interaction. Our work demonstrates monolayer WSe2 as an intriguing playground to study phonon-exciton interactions and their interplay with charge, spin, and valley.-
dc.languageeng-
dc.publisherNature Research (part of Springer Nature): Fully open access journals. The Journal's web site is located at http://www.nature.com/ncomms/index.html-
dc.relation.ispartofNature Communications-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectDARK EXCITONS-
dc.subjectVALLEY-
dc.subjectSPIN-
dc.titlePhonon-exciton Interactions in WSe2 under a quantizing magnetic field-
dc.typeArticle-
dc.identifier.emailYao, W: wangyao@hku.hk-
dc.identifier.authorityYao, W=rp00827-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1038/s41467-020-16934-x-
dc.identifier.hkuros312821-
dc.identifier.volume11-
dc.identifier.issue1-
dc.identifier.spage3104:1-
dc.identifier.epage3104:7-
dc.identifier.isiWOS:000545685100001-
dc.publisher.placeUnited Kingdom-

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