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  Freestanding few-layer sheets of a dual topological insulator

Lê Anh, M., Potapov, P., Lubk, A., Doert, T., & Ruck, M. (2021). Freestanding few-layer sheets of a dual topological insulator. 2D Materials, 5: 22, pp. 1-5. doi:10.1038/s41699-021-00203-6.

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 Creators:
Lê Anh, Mai1, Author
Potapov, Pavel1, Author
Lubk, Axel1, Author
Doert, Thomas1, Author
Ruck, Michael2, Author              
Affiliations:
1External Organizations, ou_persistent22              
2Michael Ruck, Max Planck Fellow, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863444              

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Free keywords: Crystals, Electric insulators, Heat treatment, Microelectronic processing, Microelectronics, Quantum computers, Topological insulators, Topology, Bulk semiconductors, Crystalline insulators, Crystalline thin films, Electronic band gaps, Isopropyl alcohols, Microelectronic applications, Nontrivial topology, Poly(vinyl pyrrolidone), Bismuth compounds
 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. © 2021, The Author(s).

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Language(s): eng - English
 Dates: 2021-02-182021-02-18
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1038/s41699-021-00203-6
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Title: 2D Materials
Source Genre: Journal
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Publ. Info: Bristol : IOP Publ.
Pages: - Volume / Issue: 5 Sequence Number: 22 Start / End Page: 1 - 5 Identifier: ISSN: 2053-1583
CoNE: https://pure.mpg.de/cone/journals/resource/2053-1583