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Título

Natural sulfur-containing minerals as topological insulators with a wide band gap

Autor Silkin, Viatcheslav M.; Menshchikova, T. V.; Otrokov, M. M.; Eremeev, S. V.; Koroteev, Yuri M.; Vergniory, M.; Kuznetsov, V. M.; Chulkov, Eugene V.
Fecha de publicación 2012
EditorSpringer
Citación JETP Letters 96(5): 322-325 (2012)
ResumenThe electronic structure of quaternary natural minerals PbBi 2Te 2S 2 (aleksite), Pb 2Bi 2Te 2S 3 (saddlebackite), and PbBi 4Te 4S 3 (C phase) has been theoretically studied. These compounds have a layered structure: aleksite and saddlebackite are formed by seven- and nine-layer blocks, respectively, and C phase consists of five- and seven-layer blocks separated by van der Waals gaps. It has been shown that all studied materials are three-dimensional topological insulators with a wide band gap in the electronic spectrum and have a high spin polarization. For these reasons, they are promising for applications. © 2012 Pleiades Publishing, Ltd.
URI http://hdl.handle.net/10261/101707
DOI10.1134/S0021364012170158
Identificadoresdoi: 10.1134/S0021364012170158
issn: 0021-3640
e-issn: 1090-6487
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