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Письма в Журнал экспериментальной и теоретической физики, 2012, том 96, выпуск 12, страницы 870–874
(Mi jetpl3311)
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Эта публикация цитируется в 17 научных статьях (всего в 17 статьях)
КОНДЕНСИРОВАННОЕ СОСТОЯНИЕ
New topological surface state in layered topological insulators:
unoccupied Dirac cone
S. V. Eremeevab, I. V. Silkinb, T. V. Men'shikovab, A. P. Protogenovc, E. V. Chulkovde a Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences
b Tomsk State University
c Institute of Applied Physics, Russian Academy of Sciences, Nizhnii Novgorod
d Donostia International Physics Center
e Departamento de Física de Materiales, Facultad de Quimica, UPV/EHU, San Sebastian, Basque Country
Аннотация:
The unoccupied states in topological insulators
Bi$_2$Se$_3$, PbSb$_2$Te$_4$, and Pb$_2$Bi$_2$Te$_2$S$_3$ are
studied by the density functional theory methods. It is shown that a
surface state with linear dispersion emerges in the inverted
conduction band energy gap at the center of the surface Brillouin
zone on the (0001) surface of these insulators. The alternative
expression of $\mathbb{Z}_2$ invariant allowed us to show that a
necessary condition for the existence of the second $\bar\Gamma$
Dirac cone is the presence of local gaps at the time reversal
invariant momentum points of the bulk spectrum and change of parity
in one of these points.
Поступила в редакцию: 30.10.2012
Образец цитирования:
S. V. Eremeev, I. V. Silkin, T. V. Men'shikova, A. P. Protogenov, E. V. Chulkov, “New topological surface state in layered topological insulators:
unoccupied Dirac cone”, Письма в ЖЭТФ, 96:12 (2012), 870–874; JETP Letters, 96:12 (2012), 780–784
Образцы ссылок на эту страницу:
https://www.mathnet.ru/rus/jetpl3311 https://www.mathnet.ru/rus/jetpl/v96/i12/p870
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Страница аннотации: | 473 | PDF полного текста: | 87 | Список литературы: | 67 | Первая страница: | 18 |
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