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Article: Observation of Quantized Exciton Energies in Monolayer WSe2 under a Strong Magnetic Field

TitleObservation of Quantized Exciton Energies in Monolayer WSe2 under a Strong Magnetic Field
Authors
Issue Date2020
PublisherAmerican Physical Society. The Journal's web site is located at http://journals.aps.org/prx/
Citation
Physical Review X, 2020, v. 10 n. 2, article no. 021024 How to Cite?
AbstractQuantized energy levels are one of the hallmarks of quantum mechanics at the atomic level. The manifestation of quantization in macroscopic physical systems has showcased important quantum phenomena, such as quantized conductance in (fractional) quantum Hall effects and quantized vortices in superconductors. Here we report the first experimental observation of quantized exciton energies in a macroscopic system with strong Coulomb interaction, monolayer WSe2 crystal under a strong magnetic field. Employing helicity-resolved magnetoreflectance spectroscopy, we observe a striking ladder of plateaus as a function of the gate voltage for both exciton resonance in one valley and exciton-polariton branch in the opposite valley, thanks to the inter-Landau levels transitions governed by unique valley-selective selection rules. The observed quantized excitation energy level spacing sensitively depends on the doping level, indicating strong many-body effects. Our work will inspire the study of intriguing quantum phenomena originating from the interplay between Landau levels and many-body interactions in two-dimension monolayer crystals.
Persistent Identifierhttp://hdl.handle.net/10722/286285
ISSN
2019 Impact Factor: 12.577
2015 SCImago Journal Rankings: 5.040
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, T-
dc.contributor.authorLi, Z-
dc.contributor.authorLu, Z-
dc.contributor.authorLi, Y-
dc.contributor.authorMiao, S-
dc.contributor.authorLian, Z-
dc.contributor.authorMeng, Y-
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, C-
dc.contributor.authorShi, SF-
dc.date.accessioned2020-08-31T07:01:46Z-
dc.date.available2020-08-31T07:01:46Z-
dc.date.issued2020-
dc.identifier.citationPhysical Review X, 2020, v. 10 n. 2, article no. 021024-
dc.identifier.issn2160-3308-
dc.identifier.urihttp://hdl.handle.net/10722/286285-
dc.description.abstractQuantized energy levels are one of the hallmarks of quantum mechanics at the atomic level. The manifestation of quantization in macroscopic physical systems has showcased important quantum phenomena, such as quantized conductance in (fractional) quantum Hall effects and quantized vortices in superconductors. Here we report the first experimental observation of quantized exciton energies in a macroscopic system with strong Coulomb interaction, monolayer WSe2 crystal under a strong magnetic field. Employing helicity-resolved magnetoreflectance spectroscopy, we observe a striking ladder of plateaus as a function of the gate voltage for both exciton resonance in one valley and exciton-polariton branch in the opposite valley, thanks to the inter-Landau levels transitions governed by unique valley-selective selection rules. The observed quantized excitation energy level spacing sensitively depends on the doping level, indicating strong many-body effects. Our work will inspire the study of intriguing quantum phenomena originating from the interplay between Landau levels and many-body interactions in two-dimension monolayer crystals.-
dc.languageeng-
dc.publisherAmerican Physical Society. The Journal's web site is located at http://journals.aps.org/prx/-
dc.relation.ispartofPhysical Review X-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleObservation of Quantized Exciton Energies in Monolayer WSe2 under a Strong Magnetic Field-
dc.typeArticle-
dc.identifier.emailYao, W: wangyao@hku.hk-
dc.identifier.authorityYao, W=rp00827-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1103/PhysRevX.10.021024-
dc.identifier.scopuseid_2-s2.0-85090895886-
dc.identifier.hkuros313297-
dc.identifier.volume10-
dc.identifier.issue2-
dc.identifier.spagearticle no. 021024-
dc.identifier.epagearticle no. 021024-
dc.identifier.isiWOS:000529834400001-
dc.publisher.placeUnited States-
dc.identifier.issnl2160-3308-

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