Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Niu, Chengwang, Dai, Ying, Zhu, Yingtao, Ma, Yandong, Yu, Lin, Han, Shenghao, Huang, Baibiao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2012
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
_version_ 1782252895527239680
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
work_keys_str_mv AT niuchengwang realizationoftunablediracconeandinsulatingbulkstatesintopologicalinsulatorsbi1xsbx2te3
AT daiying realizationoftunablediracconeandinsulatingbulkstatesintopologicalinsulatorsbi1xsbx2te3
AT zhuyingtao realizationoftunablediracconeandinsulatingbulkstatesintopologicalinsulatorsbi1xsbx2te3
AT mayandong realizationoftunablediracconeandinsulatingbulkstatesintopologicalinsulatorsbi1xsbx2te3
AT yulin realizationoftunablediracconeandinsulatingbulkstatesintopologicalinsulatorsbi1xsbx2te3
AT hanshenghao realizationoftunablediracconeandinsulatingbulkstatesintopologicalinsulatorsbi1xsbx2te3
AT huangbaibiao realizationoftunablediracconeandinsulatingbulkstatesintopologicalinsulatorsbi1xsbx2te3