Dimensional crossover in the quantum transport behaviour of the natural topological insulator Aleksite

Three-dimensional topological insulators comprise topologically protected surface states displaying massless, Dirac-like linear dispersion with spin-momentum locking. Electrical conduction through such surface states has been documented to manifest itself in a two-dimensional character of the angle-...

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Main Authors:	Gehring, Pascal, Vaklinova, Kristina, Hoyer, Alexander, Benia, Hadj M., Skakalova, Viera, Argentero, Giacomo, Eder, Franz, Meyer, Jannik C., Burghard, Marko, Kern, Klaus
Format:	Online
Language:	English
Published:	Nature Publishing Group 2015
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4483779/

id	pubmed-4483779
recordtype	oai_dc
spelling	pubmed-44837792015-07-08 Dimensional crossover in the quantum transport behaviour of the natural topological insulator Aleksite Gehring, Pascal Vaklinova, Kristina Hoyer, Alexander Benia, Hadj M. Skakalova, Viera Argentero, Giacomo Eder, Franz Meyer, Jannik C. Burghard, Marko Kern, Klaus Article Three-dimensional topological insulators comprise topologically protected surface states displaying massless, Dirac-like linear dispersion with spin-momentum locking. Electrical conduction through such surface states has been documented to manifest itself in a two-dimensional character of the angle-dependent magnetotransport behavior. Here, we explore the size-dependent electronic properties of nanostructures made of the lead-containing mineral Aleksite, a naturally occurring topological insulator. Compared to its sister compound Kawazulite, a member of the well-studied Tetradymite crystal class, the crystal structure of Aleksite is distinguished by its lack of any counterpart within the group of synthetic topological insulators. Low temperature Hall measurements on thin Aleksite nanosheets reveal a significant carrier mobility on the order of 1000 cm2/(Vs), and a high carrier density of n = 3.9 × 1025 m−3. Importantly, for Aleksite nanoribbons with a width below 150 nm, a 1D weak antilocalization effect along with 1D universal conductance fluctuations emerges, which transforms into 2D behavior for larger ribbon widths Nature Publishing Group 2015-06-29 /pmc/articles/PMC4483779/ /pubmed/26118383 http://dx.doi.org/10.1038/srep11691 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Gehring, Pascal Vaklinova, Kristina Hoyer, Alexander Benia, Hadj M. Skakalova, Viera Argentero, Giacomo Eder, Franz Meyer, Jannik C. Burghard, Marko Kern, Klaus
spellingShingle	Gehring, Pascal Vaklinova, Kristina Hoyer, Alexander Benia, Hadj M. Skakalova, Viera Argentero, Giacomo Eder, Franz Meyer, Jannik C. Burghard, Marko Kern, Klaus Dimensional crossover in the quantum transport behaviour of the natural topological insulator Aleksite
author_facet	Gehring, Pascal Vaklinova, Kristina Hoyer, Alexander Benia, Hadj M. Skakalova, Viera Argentero, Giacomo Eder, Franz Meyer, Jannik C. Burghard, Marko Kern, Klaus
author_sort	Gehring, Pascal
title	Dimensional crossover in the quantum transport behaviour of the natural topological insulator Aleksite
title_short	Dimensional crossover in the quantum transport behaviour of the natural topological insulator Aleksite
title_full	Dimensional crossover in the quantum transport behaviour of the natural topological insulator Aleksite
title_fullStr	Dimensional crossover in the quantum transport behaviour of the natural topological insulator Aleksite
title_full_unstemmed	Dimensional crossover in the quantum transport behaviour of the natural topological insulator Aleksite
title_sort	dimensional crossover in the quantum transport behaviour of the natural topological insulator aleksite
description	Three-dimensional topological insulators comprise topologically protected surface states displaying massless, Dirac-like linear dispersion with spin-momentum locking. Electrical conduction through such surface states has been documented to manifest itself in a two-dimensional character of the angle-dependent magnetotransport behavior. Here, we explore the size-dependent electronic properties of nanostructures made of the lead-containing mineral Aleksite, a naturally occurring topological insulator. Compared to its sister compound Kawazulite, a member of the well-studied Tetradymite crystal class, the crystal structure of Aleksite is distinguished by its lack of any counterpart within the group of synthetic topological insulators. Low temperature Hall measurements on thin Aleksite nanosheets reveal a significant carrier mobility on the order of 1000 cm2/(Vs), and a high carrier density of n = 3.9 × 1025 m−3. Importantly, for Aleksite nanoribbons with a width below 150 nm, a 1D weak antilocalization effect along with 1D universal conductance fluctuations emerges, which transforms into 2D behavior for larger ribbon widths
publisher	Nature Publishing Group
publishDate	2015
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4483779/
_version_	1613241277162192896

Dimensional crossover in the quantum transport behaviour of the natural topological insulator Aleksite

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