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| Ultima descărcare din IBN: 2022-09-10 15:43 |
 SM ISO690:2012BEJENARI, Igor, KANTSER, Valeriu. Band gap of a topological insulator nanotube. In: Moldavian Journal of the Physical Sciences, 2011, nr. 2(10), pp. 214-219. ISSN 1810-648X. |
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| Moldavian Journal of the Physical Sciences | ||||||
| Numărul 2(10) / 2011 / ISSN 1810-648X /ISSNe 2537-6365 | ||||||
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| Pag. 214-219 | ||||||
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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. |
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