Band gap of a topological insulator nanotube

We study the electronic structure of a topological insulator Bi2Te3 cylindrical nanotube. The energy spectrum was calculated in the framework of the kp theory near the Γ point of the surface Brilloiun zone. A band gap size dependence of the topological insulator nanotu...

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Autores principales:	Bejenari, Igor, Canţer, Valeriu
Formato:	article
Lenguaje:	EN
Publicado:	D.Ghitu Institute of Electronic Engineering and Nanotechnologies 2011
Materias:	Physics QC1-999 Electronics TK7800-8360
Acceso en línea:	https://doaj.org/article/d7be63bb76804786a40e80dbced2edec
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spelling	oai:doaj.org-article:d7be63bb76804786a40e80dbced2edec2021-11-21T12:02:36ZBand gap of a topological insulator nanotube2537-63651810-648Xhttps://doaj.org/article/d7be63bb76804786a40e80dbced2edec2011-06-01T00:00:00Zhttps://mjps.nanotech.md/archive/2011/article/4371https://doaj.org/toc/1810-648Xhttps://doaj.org/toc/2537-6365We study the electronic structure of a topological insulator Bi2Te3 cylindrical nanotube. The energy spectrum was calculated in the framework of the kp theory near the Γ point of the surface Brilloiun zone. A band gap size dependence of the topological insulator nanotube was studied. A comparative analysis of the topological insulator direct band gap of Bi2Te3 and Bi2Se3 nanowires as a function of radius was performed. Due to a high surface-to-volume ratio, a variation in the ratio of the nanotube external radius to internal radius provides a 50-fold decrease in the topological insulator band gap compared to the respective bulk value. The size dependence of the topological insulator nanotube band gap is much stronger than that for the topological insulator nanowires. Bejenari, IgorCanţer, ValeriuD.Ghitu Institute of Electronic Engineering and NanotechnologiesarticlePhysicsQC1-999ElectronicsTK7800-8360ENMoldavian Journal of the Physical Sciences, Vol 10, Iss 2, Pp 214-219 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronics TK7800-8360
spellingShingle	Physics QC1-999 Electronics TK7800-8360 Bejenari, Igor Canţer, Valeriu Band gap of a topological insulator nanotube
description	We study the electronic structure of a topological insulator Bi2Te3 cylindrical nanotube. The energy spectrum was calculated in the framework of the kp theory near the Γ point of the surface Brilloiun zone. A band gap size dependence of the topological insulator nanotube was studied. A comparative analysis of the topological insulator direct band gap of Bi2Te3 and Bi2Se3 nanowires as a function of radius was performed. Due to a high surface-to-volume ratio, a variation in the ratio of the nanotube external radius to internal radius provides a 50-fold decrease in the topological insulator band gap compared to the respective bulk value. The size dependence of the topological insulator nanotube band gap is much stronger than that for the topological insulator nanowires.
format	article
author	Bejenari, Igor Canţer, Valeriu
author_facet	Bejenari, Igor Canţer, Valeriu
author_sort	Bejenari, Igor
title	Band gap of a topological insulator nanotube
title_short	Band gap of a topological insulator nanotube
title_full	Band gap of a topological insulator nanotube
title_fullStr	Band gap of a topological insulator nanotube
title_full_unstemmed	Band gap of a topological insulator nanotube
title_sort	band gap of a topological insulator nanotube
publisher	D.Ghitu Institute of Electronic Engineering and Nanotechnologies
publishDate	2011
url	https://doaj.org/article/d7be63bb76804786a40e80dbced2edec
work_keys_str_mv	AT bejenariigor bandgapofatopologicalinsulatornanotube AT cantervaleriu bandgapofatopologicalinsulatornanotube
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Band gap of a topological insulator nanotube

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