1D metallic states at 2D transition metal dichalcogenide semiconductor heterojunctions

Abstract Two-dimensional (2D) lateral heterojunctions between different transition metal dichalcogenides (TMDCs) have been realized in recent years. Homogeneous semiconducting TMDC layers are characterized by a topological invariant, their in-plane electric polarization. It suggests the possibility...

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Autores principales:	Sridevi Krishnamurthi, Geert Brocks
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/90c4e68e41f54e8dbacaea190bf19c96
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id	oai:doaj.org-article:90c4e68e41f54e8dbacaea190bf19c96
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spelling	oai:doaj.org-article:90c4e68e41f54e8dbacaea190bf19c962021-12-02T14:30:25Z1D metallic states at 2D transition metal dichalcogenide semiconductor heterojunctions10.1038/s41699-021-00224-12397-7132https://doaj.org/article/90c4e68e41f54e8dbacaea190bf19c962021-04-01T00:00:00Zhttps://doi.org/10.1038/s41699-021-00224-1https://doaj.org/toc/2397-7132Abstract Two-dimensional (2D) lateral heterojunctions between different transition metal dichalcogenides (TMDCs) have been realized in recent years. Homogeneous semiconducting TMDC layers are characterized by a topological invariant, their in-plane electric polarization. It suggests the possibility of one-dimensional (1D) metallic states at heterojunctions where the value of the invariant changes. We study such lateral 2D TMDC junctions by means of first-principles calculations and show that 1D metallic states emerge even in cases where the different materials are joined epitaxially. We find that the metallicity does not depend on structural details, but, as the invariant is protected by spatial symmetry only, it can be upset by breaking the symmetry. Indeed, 1D charge- and spin-density wave instabilities appear spontaneously, making 2D TMDC heterojunctions ideal systems for studying 1D systems.Sridevi KrishnamurthiGeert BrocksNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492ChemistryQD1-999ENnpj 2D Materials and Applications, Vol 5, Iss 1, Pp 1-6 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Chemistry QD1-999
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Chemistry QD1-999 Sridevi Krishnamurthi Geert Brocks 1D metallic states at 2D transition metal dichalcogenide semiconductor heterojunctions
description	Abstract Two-dimensional (2D) lateral heterojunctions between different transition metal dichalcogenides (TMDCs) have been realized in recent years. Homogeneous semiconducting TMDC layers are characterized by a topological invariant, their in-plane electric polarization. It suggests the possibility of one-dimensional (1D) metallic states at heterojunctions where the value of the invariant changes. We study such lateral 2D TMDC junctions by means of first-principles calculations and show that 1D metallic states emerge even in cases where the different materials are joined epitaxially. We find that the metallicity does not depend on structural details, but, as the invariant is protected by spatial symmetry only, it can be upset by breaking the symmetry. Indeed, 1D charge- and spin-density wave instabilities appear spontaneously, making 2D TMDC heterojunctions ideal systems for studying 1D systems.
format	article
author	Sridevi Krishnamurthi Geert Brocks
author_facet	Sridevi Krishnamurthi Geert Brocks
author_sort	Sridevi Krishnamurthi
title	1D metallic states at 2D transition metal dichalcogenide semiconductor heterojunctions
title_short	1D metallic states at 2D transition metal dichalcogenide semiconductor heterojunctions
title_full	1D metallic states at 2D transition metal dichalcogenide semiconductor heterojunctions
title_fullStr	1D metallic states at 2D transition metal dichalcogenide semiconductor heterojunctions
title_full_unstemmed	1D metallic states at 2D transition metal dichalcogenide semiconductor heterojunctions
title_sort	1d metallic states at 2d transition metal dichalcogenide semiconductor heterojunctions
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/90c4e68e41f54e8dbacaea190bf19c96
work_keys_str_mv	AT sridevikrishnamurthi 1dmetallicstatesat2dtransitionmetaldichalcogenidesemiconductorheterojunctions AT geertbrocks 1dmetallicstatesat2dtransitionmetaldichalcogenidesemiconductorheterojunctions
_version_	1718391206308741120

1D metallic states at 2D transition metal dichalcogenide semiconductor heterojunctions

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