Proximity effects on the charge density wave order and superconductivity in single-layer NbSe2

Collective electronic states such as the charge density wave (CDW) order and superconductivity (SC) respond sensitively to external perturbations. Such sensitivity is dramatically enhanced in two dimensions (2D), where 2D materials hosting such electronic states are largely exposed to the environmen...

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Autores: Dreher, Paul, Wan, Wen, Chikina, Alla, Bianchi, Marco, Guo, Haojie, Harsh, Rishav, Mañas Valero, Samuel, Coronado, Eugenio, Martínez-Galera, Antonio J., Hofmann, Ph., Miwa, Jill A., Ugeda, Miguel M.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/264374
Acceso en línea:http://hdl.handle.net/10261/264374
Access Level:acceso abierto
Palabra clave:Transition-metal dichalcogenide
Superconductivity
Charge density waves
Electronic structure
Angle-resolved photoemission spectroscopy
Epitaxy
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dc.title.none.fl_str_mv Proximity effects on the charge density wave order and superconductivity in single-layer NbSe2
title Proximity effects on the charge density wave order and superconductivity in single-layer NbSe2
spellingShingle Proximity effects on the charge density wave order and superconductivity in single-layer NbSe2
Dreher, Paul
Transition-metal dichalcogenide
Superconductivity
Charge density waves
Electronic structure
Angle-resolved photoemission spectroscopy
Epitaxy
title_short Proximity effects on the charge density wave order and superconductivity in single-layer NbSe2
title_full Proximity effects on the charge density wave order and superconductivity in single-layer NbSe2
title_fullStr Proximity effects on the charge density wave order and superconductivity in single-layer NbSe2
title_full_unstemmed Proximity effects on the charge density wave order and superconductivity in single-layer NbSe2
title_sort Proximity effects on the charge density wave order and superconductivity in single-layer NbSe2
dc.creator.none.fl_str_mv Dreher, Paul
Wan, Wen
Chikina, Alla
Bianchi, Marco
Guo, Haojie
Harsh, Rishav
Mañas Valero, Samuel
Coronado, Eugenio
Martínez-Galera, Antonio J.
Hofmann, Ph.
Miwa, Jill A.
Ugeda, Miguel M.
author Dreher, Paul
author_facet Dreher, Paul
Wan, Wen
Chikina, Alla
Bianchi, Marco
Guo, Haojie
Harsh, Rishav
Mañas Valero, Samuel
Coronado, Eugenio
Martínez-Galera, Antonio J.
Hofmann, Ph.
Miwa, Jill A.
Ugeda, Miguel M.
author_role author
author2 Wan, Wen
Chikina, Alla
Bianchi, Marco
Guo, Haojie
Harsh, Rishav
Mañas Valero, Samuel
Coronado, Eugenio
Martínez-Galera, Antonio J.
Hofmann, Ph.
Miwa, Jill A.
Ugeda, Miguel M.
author2_role author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv European Commission
European Research Council
Ministerio de Ciencia, Innovación y Universidades (España)
Agencia Estatal de Investigación (España)
Danish Council for Independent Research
Generalitat Valenciana
Ministerio de Economía y Competitividad (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Transition-metal dichalcogenide
Superconductivity
Charge density waves
Electronic structure
Angle-resolved photoemission spectroscopy
Epitaxy
topic Transition-metal dichalcogenide
Superconductivity
Charge density waves
Electronic structure
Angle-resolved photoemission spectroscopy
Epitaxy
description Collective electronic states such as the charge density wave (CDW) order and superconductivity (SC) respond sensitively to external perturbations. Such sensitivity is dramatically enhanced in two dimensions (2D), where 2D materials hosting such electronic states are largely exposed to the environment. In this regard, the ineludible presence of supporting substrates triggers various proximity effects on 2D materials that may ultimately compromise the stability and properties of the electronic ground state. In this work, we investigate the impact of proximity effects on the CDW and superconducting states in single-layer (SL) NbSe2 on four substrates of diverse nature, namely, bilayer graphene (BLG), SL-boron nitride (h-BN), Au(111), and bulk WSe2. By combining low-temperature (340 mK) scanning tunneling microscopy/spectroscopy and angle-resolved photoemission spectroscopy, we compare the electronic structure of this prototypical 2D superconductor on each substrate. We find that, even when the electronic band structure of SL-NbSe2 remains largely unaffected by the substrate except when placed on Au(111), where a charge transfer occurs, both the CDW and SC show disparate behaviors. On the insulating h-BN/Ir(111) substrate and the metallic BLG/SiC(0001) substrate, both the 3 × 3 CDW and superconducting phases persist in SL-NbSe2 with very similar properties, which reveals the negligible impact of graphene on these electronic phases. In contrast, these collective electronic phases are severely weakened and even absent on the bulk insulating WSe2 substrate and the metallic single-crystal Au(111) substrate. Our results provide valuable insights into the fragile stability of such electronic ground states in 2D materials.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
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status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/264374
url http://hdl.handle.net/10261/264374
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
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info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-116619GB-C21
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https://doi.org/10.1021/acsnano.1c06012
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dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
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spelling Proximity effects on the charge density wave order and superconductivity in single-layer NbSe2Dreher, PaulWan, WenChikina, AllaBianchi, MarcoGuo, HaojieHarsh, RishavMañas Valero, SamuelCoronado, EugenioMartínez-Galera, Antonio J.Hofmann, Ph.Miwa, Jill A.Ugeda, Miguel M.Transition-metal dichalcogenideSuperconductivityCharge density wavesElectronic structureAngle-resolved photoemission spectroscopyEpitaxyCollective electronic states such as the charge density wave (CDW) order and superconductivity (SC) respond sensitively to external perturbations. Such sensitivity is dramatically enhanced in two dimensions (2D), where 2D materials hosting such electronic states are largely exposed to the environment. In this regard, the ineludible presence of supporting substrates triggers various proximity effects on 2D materials that may ultimately compromise the stability and properties of the electronic ground state. In this work, we investigate the impact of proximity effects on the CDW and superconducting states in single-layer (SL) NbSe2 on four substrates of diverse nature, namely, bilayer graphene (BLG), SL-boron nitride (h-BN), Au(111), and bulk WSe2. By combining low-temperature (340 mK) scanning tunneling microscopy/spectroscopy and angle-resolved photoemission spectroscopy, we compare the electronic structure of this prototypical 2D superconductor on each substrate. We find that, even when the electronic band structure of SL-NbSe2 remains largely unaffected by the substrate except when placed on Au(111), where a charge transfer occurs, both the CDW and SC show disparate behaviors. On the insulating h-BN/Ir(111) substrate and the metallic BLG/SiC(0001) substrate, both the 3 × 3 CDW and superconducting phases persist in SL-NbSe2 with very similar properties, which reveals the negligible impact of graphene on these electronic phases. In contrast, these collective electronic phases are severely weakened and even absent on the bulk insulating WSe2 substrate and the metallic single-crystal Au(111) substrate. Our results provide valuable insights into the fragile stability of such electronic ground states in 2D materials.M.M.U. acknowledges support by the ERC Starting grant LINKSPM (grant 758558) and by the Spanish MINECO under grant no. PID2020-116619GB-C21. J.A.M. acknowledges financial support from the Danish Council for Independent Research, Natural Sciences under the Sapere Aude program (grant no. DFF-6108-00409). A.C, M.B., J.A.M., and P.H. acknowledge support from the VILLUM FONDEN via the Centre of Excellence for Dirac Materials (grant no. 11744). A.J.M.-G. acknowledges funding by the Spanish MINECO through project no. PID2020-116619GA-C22. E.C. and S.M.-V. acknowledge the Spanish MICINN (project PID2020-117152RB-I00 cofinanced by FEDER and the Unit of Excellence “Maria de Maeztu” CEX2019-000919-M) and the Generalitat Valenciana (Prometeo Programme and PO FEDER Program IDIFEDER/2018/061 and IDFEDER/2020/063). R.H. acknowledges support from Marie Skłodowska-Curie Individual Fellowships under HORIZON 2020 program for project MAGTMD (101033538).Peer reviewedAmerican Chemical SocietyEuropean CommissionEuropean Research CouncilMinisterio de Ciencia, Innovación y Universidades (España)Agencia Estatal de Investigación (España)Danish Council for Independent ResearchGeneralitat ValencianaMinisterio de Economía y Competitividad (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202220222021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/264374reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/H2020/758558info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-116619GB-C21info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-116619GA-C22info:eu-repo/grantAgreement/AEI//CEX2019-000919-Minfo:eu-repo/grantAgreement/EC/H2020/101033538https://doi.org/10.1021/acsnano.1c06012Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2643742026-05-22T06:33:51Z
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