Strain and Spin-Orbit Coupling Engineering in Twisted WS<sub>2</sub>/Graphene Heterobilayer

The strain in hybrid van der Waals heterostructures, made of two distinct two-dimensional van der Waals materials, offers an interesting handle on their corresponding electronic band structure. Such strain can be engineered by changing the relative crystallographic orientation between the constituti...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Cyrine Ernandes, Lama Khalil, Hugo Henck, Meng-Qiang Zhao, Julien Chaste, Fabrice Oehler, Alan T. Charlie Johnson, Maria C. Asensio, Debora Pierucci, Marco Pala, José Avila, Abdelkarim Ouerghi
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	twisted heterobilayer van der Waals materials spin-orbit coupling band structure Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/1fbc42764e234c308f21edb50a5a95e8
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:1fbc42764e234c308f21edb50a5a95e8
record_format	dspace
spelling	oai:doaj.org-article:1fbc42764e234c308f21edb50a5a95e82021-11-25T18:30:53ZStrain and Spin-Orbit Coupling Engineering in Twisted WS<sub>2</sub>/Graphene Heterobilayer10.3390/nano111129212079-4991https://doaj.org/article/1fbc42764e234c308f21edb50a5a95e82021-10-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/2921https://doaj.org/toc/2079-4991The strain in hybrid van der Waals heterostructures, made of two distinct two-dimensional van der Waals materials, offers an interesting handle on their corresponding electronic band structure. Such strain can be engineered by changing the relative crystallographic orientation between the constitutive monolayers, notably, the angular misorientation, also known as the “twist angle”. By combining angle-resolved photoemission spectroscopy with density functional theory calculations, we investigate here the band structure of the WS<sub>2</sub>/graphene heterobilayer for various twist angles. Despite the relatively weak coupling between WS<sub>2</sub> and graphene, we demonstrate that the resulting strain quantitatively affects many electronic features of the WS<sub>2</sub> monolayers, including the spin-orbit coupling strength. In particular, we show that the WS<sub>2</sub> spin-orbit splitting of the valence band maximum at K can be tuned from 430 to 460 meV. Our findings open perspectives in controlling the band dispersion of van der Waals materials.Cyrine ErnandesLama KhalilHugo HenckMeng-Qiang ZhaoJulien ChasteFabrice OehlerAlan T. Charlie JohnsonMaria C. AsensioDebora PierucciMarco PalaJosé AvilaAbdelkarim OuerghiMDPI AGarticletwisted heterobilayervan der Waals materialsspin-orbit couplingband structureChemistryQD1-999ENNanomaterials, Vol 11, Iss 2921, p 2921 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	twisted heterobilayer van der Waals materials spin-orbit coupling band structure Chemistry QD1-999
spellingShingle	twisted heterobilayer van der Waals materials spin-orbit coupling band structure Chemistry QD1-999 Cyrine Ernandes Lama Khalil Hugo Henck Meng-Qiang Zhao Julien Chaste Fabrice Oehler Alan T. Charlie Johnson Maria C. Asensio Debora Pierucci Marco Pala José Avila Abdelkarim Ouerghi Strain and Spin-Orbit Coupling Engineering in Twisted WS<sub>2</sub>/Graphene Heterobilayer
description	The strain in hybrid van der Waals heterostructures, made of two distinct two-dimensional van der Waals materials, offers an interesting handle on their corresponding electronic band structure. Such strain can be engineered by changing the relative crystallographic orientation between the constitutive monolayers, notably, the angular misorientation, also known as the “twist angle”. By combining angle-resolved photoemission spectroscopy with density functional theory calculations, we investigate here the band structure of the WS<sub>2</sub>/graphene heterobilayer for various twist angles. Despite the relatively weak coupling between WS<sub>2</sub> and graphene, we demonstrate that the resulting strain quantitatively affects many electronic features of the WS<sub>2</sub> monolayers, including the spin-orbit coupling strength. In particular, we show that the WS<sub>2</sub> spin-orbit splitting of the valence band maximum at K can be tuned from 430 to 460 meV. Our findings open perspectives in controlling the band dispersion of van der Waals materials.
format	article
author	Cyrine Ernandes Lama Khalil Hugo Henck Meng-Qiang Zhao Julien Chaste Fabrice Oehler Alan T. Charlie Johnson Maria C. Asensio Debora Pierucci Marco Pala José Avila Abdelkarim Ouerghi
author_facet	Cyrine Ernandes Lama Khalil Hugo Henck Meng-Qiang Zhao Julien Chaste Fabrice Oehler Alan T. Charlie Johnson Maria C. Asensio Debora Pierucci Marco Pala José Avila Abdelkarim Ouerghi
author_sort	Cyrine Ernandes
title	Strain and Spin-Orbit Coupling Engineering in Twisted WS<sub>2</sub>/Graphene Heterobilayer
title_short	Strain and Spin-Orbit Coupling Engineering in Twisted WS<sub>2</sub>/Graphene Heterobilayer
title_full	Strain and Spin-Orbit Coupling Engineering in Twisted WS<sub>2</sub>/Graphene Heterobilayer
title_fullStr	Strain and Spin-Orbit Coupling Engineering in Twisted WS<sub>2</sub>/Graphene Heterobilayer
title_full_unstemmed	Strain and Spin-Orbit Coupling Engineering in Twisted WS<sub>2</sub>/Graphene Heterobilayer
title_sort	strain and spin-orbit coupling engineering in twisted ws<sub>2</sub>/graphene heterobilayer
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/1fbc42764e234c308f21edb50a5a95e8
work_keys_str_mv	AT cyrineernandes strainandspinorbitcouplingengineeringintwistedwssub2subgrapheneheterobilayer AT lamakhalil strainandspinorbitcouplingengineeringintwistedwssub2subgrapheneheterobilayer AT hugohenck strainandspinorbitcouplingengineeringintwistedwssub2subgrapheneheterobilayer AT mengqiangzhao strainandspinorbitcouplingengineeringintwistedwssub2subgrapheneheterobilayer AT julienchaste strainandspinorbitcouplingengineeringintwistedwssub2subgrapheneheterobilayer AT fabriceoehler strainandspinorbitcouplingengineeringintwistedwssub2subgrapheneheterobilayer AT alantcharliejohnson strainandspinorbitcouplingengineeringintwistedwssub2subgrapheneheterobilayer AT mariacasensio strainandspinorbitcouplingengineeringintwistedwssub2subgrapheneheterobilayer AT deborapierucci strainandspinorbitcouplingengineeringintwistedwssub2subgrapheneheterobilayer AT marcopala strainandspinorbitcouplingengineeringintwistedwssub2subgrapheneheterobilayer AT joseavila strainandspinorbitcouplingengineeringintwistedwssub2subgrapheneheterobilayer AT abdelkarimouerghi strainandspinorbitcouplingengineeringintwistedwssub2subgrapheneheterobilayer
_version_	1718411002427473920

Strain and Spin-Orbit Coupling Engineering in Twisted WS<sub>2</sub>/Graphene Heterobilayer

Ejemplares similares