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

I. V. Silkin, T. V. Menshchikova, M. M. Otrokov, S. V. Eremeev, Yu M. Koroteev, M. G. Vergniory, V. M. Kuznetsov, E. V. Chulkov

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Abstract

The 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.

Original languageEnglish
Pages (from-to)322-325
Number of pages4
JournalJETP Letters
Volume96
Issue number5
DOIs
Publication statusPublished - Nov 2012
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Silkin, I. V., Menshchikova, T. V., Otrokov, M. M., Eremeev, S. V., Koroteev, Y. M., Vergniory, M. G., ... Chulkov, E. V. (2012). Natural sulfur-containing minerals as topological insulators with a wide band gap. JETP Letters, 96(5), 322-325. https://doi.org/10.1134/S0021364012170158