$Observation of Quantized Exciton Energies in Monolayer WSe_{2} under a Strong Magnetic Field$
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Observation of Quantized Exciton Energies in Monolayer WSe_{2} under a Strong Magnetic Field

Quantized 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 superco...

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Autores principales:	Tianmeng Wang, Zhipeng Li, Zhengguang Lu, Yunmei Li, Shengnan Miao, Zhen Lian, Yuze Meng, Mark Blei, Takashi Taniguchi, Kenji Watanabe, Sefaattin Tongay, Wang Yao, Dmitry Smirnov, Chuanwei Zhang, Su-Fei Shi
Formato:	article
Lenguaje:	EN
Publicado:	American Physical Society 2020
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/5aaf4707ccf544eb8ecca806d4ac8065
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spelling	oai:doaj.org-article:5aaf4707ccf544eb8ecca806d4ac80652021-12-02T12:33:39ZObservation of Quantized Exciton Energies in Monolayer WSe_{2} under a Strong Magnetic Field10.1103/PhysRevX.10.0210242160-3308https://doaj.org/article/5aaf4707ccf544eb8ecca806d4ac80652020-04-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.10.021024http://doi.org/10.1103/PhysRevX.10.021024https://doaj.org/toc/2160-3308Quantized 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 WSe_{2} 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.Tianmeng WangZhipeng LiZhengguang LuYunmei LiShengnan MiaoZhen LianYuze MengMark BleiTakashi TaniguchiKenji WatanabeSefaattin TongayWang YaoDmitry SmirnovChuanwei ZhangSu-Fei ShiAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 10, Iss 2, p 021024 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Tianmeng Wang Zhipeng Li Zhengguang Lu Yunmei Li Shengnan Miao Zhen Lian Yuze Meng Mark Blei Takashi Taniguchi Kenji Watanabe Sefaattin Tongay Wang Yao Dmitry Smirnov Chuanwei Zhang Su-Fei Shi Observation of Quantized Exciton Energies in Monolayer WSe_{2} under a Strong Magnetic Field
description	Quantized 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 WSe_{2} 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.
format	article
author	Tianmeng Wang Zhipeng Li Zhengguang Lu Yunmei Li Shengnan Miao Zhen Lian Yuze Meng Mark Blei Takashi Taniguchi Kenji Watanabe Sefaattin Tongay Wang Yao Dmitry Smirnov Chuanwei Zhang Su-Fei Shi
author_facet	Tianmeng Wang Zhipeng Li Zhengguang Lu Yunmei Li Shengnan Miao Zhen Lian Yuze Meng Mark Blei Takashi Taniguchi Kenji Watanabe Sefaattin Tongay Wang Yao Dmitry Smirnov Chuanwei Zhang Su-Fei Shi
author_sort	Tianmeng Wang
title	Observation of Quantized Exciton Energies in Monolayer WSe_{2} under a Strong Magnetic Field
title_short	Observation of Quantized Exciton Energies in Monolayer WSe_{2} under a Strong Magnetic Field
title_full	Observation of Quantized Exciton Energies in Monolayer WSe_{2} under a Strong Magnetic Field
title_fullStr	Observation of Quantized Exciton Energies in Monolayer WSe_{2} under a Strong Magnetic Field
title_full_unstemmed	Observation of Quantized Exciton Energies in Monolayer WSe_{2} under a Strong Magnetic Field
title_sort	observation of quantized exciton energies in monolayer wse_{2} under a strong magnetic field
publisher	American Physical Society
publishDate	2020
url	https://doaj.org/article/5aaf4707ccf544eb8ecca806d4ac8065
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_version_	1718393859785883648

Observation of Quantized Exciton Energies in Monolayer WSe_{2} under a Strong Magnetic Field

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