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Realization of tunable Dirac cone and insulating bulk states in topological insulators (Bi(1−x)Sb(x))(2)Te(3)
The bulk-insulating topological insulators with tunable surface states are necessary for applications in spintronics and quantum computation. Here we present theoretical evidence for modulating the topological surface states and achieving the insulating bulk states in solid-solution (Bi(1−x)Sb(x))(2...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2012
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3521154/ https://www.ncbi.nlm.nih.gov/pubmed/23240080 http://dx.doi.org/10.1038/srep00976 |
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author | Niu, Chengwang Dai, Ying Zhu, Yingtao Ma, Yandong Yu, Lin Han, Shenghao Huang, Baibiao |
author_facet | Niu, Chengwang Dai, Ying Zhu, Yingtao Ma, Yandong Yu, Lin Han, Shenghao Huang, Baibiao |
author_sort | Niu, Chengwang |
collection | PubMed |
description | The bulk-insulating topological insulators with tunable surface states are necessary for applications in spintronics and quantum computation. Here we present theoretical evidence for modulating the topological surface states and achieving the insulating bulk states in solid-solution (Bi(1−x)Sb(x))(2)Te(3). Our results reveal that the band inversion occurs in (Bi(1−x)Sb(x))(2)Te(3), indicating the non-triviality across the entire composition range, and the Dirac point moves upwards till it lies within the bulk energy gap accompanying the increase of Sb concentration x. In addition, with increasing x, the formation of prominent native defects becomes much more difficult, resulting in the truly insulating bulk. The solid-solution system is a promising way of tuning the properties of topological insulators and designing novel topologically insulating devices. |
format | Online Article Text |
id | pubmed-3521154 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-35211542012-12-13 Realization of tunable Dirac cone and insulating bulk states in topological insulators (Bi(1−x)Sb(x))(2)Te(3) Niu, Chengwang Dai, Ying Zhu, Yingtao Ma, Yandong Yu, Lin Han, Shenghao Huang, Baibiao Sci Rep Article The bulk-insulating topological insulators with tunable surface states are necessary for applications in spintronics and quantum computation. Here we present theoretical evidence for modulating the topological surface states and achieving the insulating bulk states in solid-solution (Bi(1−x)Sb(x))(2)Te(3). Our results reveal that the band inversion occurs in (Bi(1−x)Sb(x))(2)Te(3), indicating the non-triviality across the entire composition range, and the Dirac point moves upwards till it lies within the bulk energy gap accompanying the increase of Sb concentration x. In addition, with increasing x, the formation of prominent native defects becomes much more difficult, resulting in the truly insulating bulk. The solid-solution system is a promising way of tuning the properties of topological insulators and designing novel topologically insulating devices. Nature Publishing Group 2012-12-13 /pmc/articles/PMC3521154/ /pubmed/23240080 http://dx.doi.org/10.1038/srep00976 Text en Copyright © 2012, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/ |
spellingShingle | Article Niu, Chengwang Dai, Ying Zhu, Yingtao Ma, Yandong Yu, Lin Han, Shenghao Huang, Baibiao Realization of tunable Dirac cone and insulating bulk states in topological insulators (Bi(1−x)Sb(x))(2)Te(3) |
title | Realization of tunable Dirac cone and insulating bulk states in topological insulators (Bi(1−x)Sb(x))(2)Te(3) |
title_full | Realization of tunable Dirac cone and insulating bulk states in topological insulators (Bi(1−x)Sb(x))(2)Te(3) |
title_fullStr | Realization of tunable Dirac cone and insulating bulk states in topological insulators (Bi(1−x)Sb(x))(2)Te(3) |
title_full_unstemmed | Realization of tunable Dirac cone and insulating bulk states in topological insulators (Bi(1−x)Sb(x))(2)Te(3) |
title_short | Realization of tunable Dirac cone and insulating bulk states in topological insulators (Bi(1−x)Sb(x))(2)Te(3) |
title_sort | realization of tunable dirac cone and insulating bulk states in topological insulators (bi(1−x)sb(x))(2)te(3) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3521154/ https://www.ncbi.nlm.nih.gov/pubmed/23240080 http://dx.doi.org/10.1038/srep00976 |
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