Vertical Quantum Confinement in Bulk MoS2

We experimentally observe quantum confinement states in bulk MoS2 by using angle-resolved photoemission spectroscopy (ARPES). The band structure at the Gamma point reveals quantum well states (QWSs) linked to vertical quantum confinement of the electrons, confirmed by the absence of dispersion in k...

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Authors: Obando Guevara, Jairo, González García, Álvaro, Rosmus, Marcin, Olszowska, Natalia, González Barrio, Miguel Ángel, González Pascual, César, Tejeda, Antonio, Mascaraque Susunaga, Arantzazu
Format: article
Publication Date:2025
Country:España
Institution:Universidad Complutense de Madrid (UCM)
Repository:Docta Complutense
Language:English
OAI Identifier:oai:docta.ucm.es:20.500.14352/118180
Online Access:https://hdl.handle.net/20.500.14352/118180
Access Level:Embargoed access
Keyword:538.9
Multilayer semiconductor
Two-dimensional material
Quantum well states
Band structure
Angle-resolved photoemission spectroscopy
Física del estado sólido
2211 Física del Estado Sólido
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oai_identifier_str oai:docta.ucm.es:20.500.14352/118180
network_acronym_str ES
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spelling Vertical Quantum Confinement in Bulk MoS2Obando Guevara, JairoGonzález García, ÁlvaroRosmus, MarcinOlszowska, NataliaGonzález Barrio, Miguel ÁngelGonzález Pascual, CésarTejeda, AntonioMascaraque Susunaga, Arantzazu538.9Multilayer semiconductorTwo-dimensional materialQuantum well statesBand structureAngle-resolved photoemission spectroscopyFísica del estado sólido2211 Física del Estado SólidoWe experimentally observe quantum confinement states in bulk MoS2 by using angle-resolved photoemission spectroscopy (ARPES). The band structure at the Gamma point reveals quantum well states (QWSs) linked to vertical quantum confinement of the electrons, confirmed by the absence of dispersion in k z and a strong intensity modulation with the photon energy. Notably, the binding energy dependence of the QWSs versus n does not follow the quadratic dependence of a two-dimensional electron gas. Instead, a linear behavior is observed that is consistent with a parabolic-like quantum well. This confinement arises from the mechanical exfoliation preparation method, which leads to the detachment of a multilayer stack from the underlying bulk. This is confirmed by density functional theory (DFT) calculations. The quantum confinement in bulk-like MoS2 not only offers the opportunity to explore intersubband transitions to exploit optical properties but also provides a means to study fundamental quantum phenomena in multilayer stacks of different thicknesses.ACS PublicationsUniversidad Complutense de Madrid20252025-01-0120252025-01-01journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/118180reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)InglésengAgencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 PID2020-117024GB-C43 NUEVOS MATERIALES PARA UNA CONMUTACION MAGNETICA EFICIENTE EN LA NANOESCALAAgencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 PID2021-123112OB-C21embargoed accesshttp://purl.org/coar/access_right/c_f1cfinfo:eu-repo/semantics/embargoedAccessoai:docta.ucm.es:20.500.14352/1181802026-06-02T12:44:21Z
dc.title.none.fl_str_mv Vertical Quantum Confinement in Bulk MoS2
title Vertical Quantum Confinement in Bulk MoS2
spellingShingle Vertical Quantum Confinement in Bulk MoS2
Obando Guevara, Jairo
538.9
Multilayer semiconductor
Two-dimensional material
Quantum well states
Band structure
Angle-resolved photoemission spectroscopy
Física del estado sólido
2211 Física del Estado Sólido
title_short Vertical Quantum Confinement in Bulk MoS2
title_full Vertical Quantum Confinement in Bulk MoS2
title_fullStr Vertical Quantum Confinement in Bulk MoS2
title_full_unstemmed Vertical Quantum Confinement in Bulk MoS2
title_sort Vertical Quantum Confinement in Bulk MoS2
dc.creator.none.fl_str_mv Obando Guevara, Jairo
González García, Álvaro
Rosmus, Marcin
Olszowska, Natalia
González Barrio, Miguel Ángel
González Pascual, César
Tejeda, Antonio
Mascaraque Susunaga, Arantzazu
author Obando Guevara, Jairo
author_facet Obando Guevara, Jairo
González García, Álvaro
Rosmus, Marcin
Olszowska, Natalia
González Barrio, Miguel Ángel
González Pascual, César
Tejeda, Antonio
Mascaraque Susunaga, Arantzazu
author_role author
author2 González García, Álvaro
Rosmus, Marcin
Olszowska, Natalia
González Barrio, Miguel Ángel
González Pascual, César
Tejeda, Antonio
Mascaraque Susunaga, Arantzazu
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 538.9
Multilayer semiconductor
Two-dimensional material
Quantum well states
Band structure
Angle-resolved photoemission spectroscopy
Física del estado sólido
2211 Física del Estado Sólido
topic 538.9
Multilayer semiconductor
Two-dimensional material
Quantum well states
Band structure
Angle-resolved photoemission spectroscopy
Física del estado sólido
2211 Física del Estado Sólido
description We experimentally observe quantum confinement states in bulk MoS2 by using angle-resolved photoemission spectroscopy (ARPES). The band structure at the Gamma point reveals quantum well states (QWSs) linked to vertical quantum confinement of the electrons, confirmed by the absence of dispersion in k z and a strong intensity modulation with the photon energy. Notably, the binding energy dependence of the QWSs versus n does not follow the quadratic dependence of a two-dimensional electron gas. Instead, a linear behavior is observed that is consistent with a parabolic-like quantum well. This confinement arises from the mechanical exfoliation preparation method, which leads to the detachment of a multilayer stack from the underlying bulk. This is confirmed by density functional theory (DFT) calculations. The quantum confinement in bulk-like MoS2 not only offers the opportunity to explore intersubband transitions to exploit optical properties but also provides a means to study fundamental quantum phenomena in multilayer stacks of different thicknesses.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025-01-01
2025
2025-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/118180
url https://hdl.handle.net/20.500.14352/118180
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 PID2020-117024GB-C43 NUEVOS MATERIALES PARA UNA CONMUTACION MAGNETICA EFICIENTE EN LA NANOESCALA
Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 PID2021-123112OB-C21
dc.rights.none.fl_str_mv embargoed access
http://purl.org/coar/access_right/c_f1cf
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/embargoedAccess
rights_invalid_str_mv embargoed access
http://purl.org/coar/access_right/c_f1cf
eu_rights_str_mv embargoedAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv ACS Publications
publisher.none.fl_str_mv ACS Publications
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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