Freestanding few-layer sheets of a dual topological insulator

Abstract The emergence of topological insulators (TIs) raised high expectations for their application in quantum computers and spintronics. Being bulk semiconductors, their nontrivial topology at the electronic bandgap enables dissipation-free charge and spin transport in protected metallic surface...

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Autores principales:	Mai Lê Anh, Pavel Potapov, Axel Lubk, Thomas Doert, Michael Ruck
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/b0ca11690dd742f0bbd488a2cd4ba642
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id	oai:doaj.org-article:b0ca11690dd742f0bbd488a2cd4ba642
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spelling	oai:doaj.org-article:b0ca11690dd742f0bbd488a2cd4ba6422021-12-02T14:03:39ZFreestanding few-layer sheets of a dual topological insulator10.1038/s41699-021-00203-62397-7132https://doaj.org/article/b0ca11690dd742f0bbd488a2cd4ba6422021-02-01T00:00:00Zhttps://doi.org/10.1038/s41699-021-00203-6https://doaj.org/toc/2397-7132Abstract The emergence of topological insulators (TIs) raised high expectations for their application in quantum computers and spintronics. Being bulk semiconductors, their nontrivial topology at the electronic bandgap enables dissipation-free charge and spin transport in protected metallic surface states. For application, crystalline thin films are requested in sufficient quantity. A suitable approach is the liquid phase exfoliation (LPE) of TI crystals that have layered structures. Bi2TeI is a weak 3D TI, which leads to protected edge states at the side facets of a crystal, as well as a topological crystalline insulator, which is responsible for protected states at the top and bottom faces. We developed an effective, scalable protocol for LPE of freestanding nanoflakes from Bi2TeI crystals. By heat treatment and sonication in isopropyl alcohol and poly(vinylpyrrolidone), crystalline Bi2TeI sheets with a thickness of ~50 nm were obtained and can therefore be considered for further processing toward microelectronic applications.Mai Lê AnhPavel PotapovAxel LubkThomas DoertMichael RuckNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492ChemistryQD1-999ENnpj 2D Materials and Applications, Vol 5, Iss 1, Pp 1-5 (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 Mai Lê Anh Pavel Potapov Axel Lubk Thomas Doert Michael Ruck Freestanding few-layer sheets of a dual topological insulator
description	Abstract The emergence of topological insulators (TIs) raised high expectations for their application in quantum computers and spintronics. Being bulk semiconductors, their nontrivial topology at the electronic bandgap enables dissipation-free charge and spin transport in protected metallic surface states. For application, crystalline thin films are requested in sufficient quantity. A suitable approach is the liquid phase exfoliation (LPE) of TI crystals that have layered structures. Bi2TeI is a weak 3D TI, which leads to protected edge states at the side facets of a crystal, as well as a topological crystalline insulator, which is responsible for protected states at the top and bottom faces. We developed an effective, scalable protocol for LPE of freestanding nanoflakes from Bi2TeI crystals. By heat treatment and sonication in isopropyl alcohol and poly(vinylpyrrolidone), crystalline Bi2TeI sheets with a thickness of ~50 nm were obtained and can therefore be considered for further processing toward microelectronic applications.
format	article
author	Mai Lê Anh Pavel Potapov Axel Lubk Thomas Doert Michael Ruck
author_facet	Mai Lê Anh Pavel Potapov Axel Lubk Thomas Doert Michael Ruck
author_sort	Mai Lê Anh
title	Freestanding few-layer sheets of a dual topological insulator
title_short	Freestanding few-layer sheets of a dual topological insulator
title_full	Freestanding few-layer sheets of a dual topological insulator
title_fullStr	Freestanding few-layer sheets of a dual topological insulator
title_full_unstemmed	Freestanding few-layer sheets of a dual topological insulator
title_sort	freestanding few-layer sheets of a dual topological insulator
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b0ca11690dd742f0bbd488a2cd4ba642
work_keys_str_mv	AT maileanh freestandingfewlayersheetsofadualtopologicalinsulator AT pavelpotapov freestandingfewlayersheetsofadualtopologicalinsulator AT axellubk freestandingfewlayersheetsofadualtopologicalinsulator AT thomasdoert freestandingfewlayersheetsofadualtopologicalinsulator AT michaelruck freestandingfewlayersheetsofadualtopologicalinsulator
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Freestanding few-layer sheets of a dual topological insulator

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