The DOI matches its Crossref record; 19 of the 19 references it cites were found in a registry or an index.
The space group classification of topological band-insulators
Open accessAbstract
Topological band-insulators (TBIs) are bulk insulating materials, which in the presence of time-reversal symmetry feature topologically protected metallic states on their surface or edge. They have recently been discovered in two- and three-dimensional materials with a strong spin–orbit coupling. These unusual states of quantum matter may host Majorana fermions and provide the condensed-matter realization of the exotic theta-vacuum. The existing classification of TBIs departs from time-reversal symmetry, but the role of the crystal-lattice symmetries in the physics of these topological states has remained elusive. Here we provide the classification of TBIs protected not only by time-reversal, but also by crystalline symmetries. We find three broad classes of topological states: Γ states robust against general time-reversal invariant perturbations; translationally active states protected from elastic scattering, but susceptible to topological crystalline disorder; valley topological insulators sensitive to the effects of non-topological and crystalline disorder. These three classes give rise to 18 different two-dimensional, and, at least 70 three-dimensional TBIs, opening up a route for the systematic search for new types of TBIs. Topological insulators are now shown to be protected not only by time-reversal symmetry, but also by crystal lattice symmetry. By accounting for the crystalline symmetries, additional topological insulators can be predicted.
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Citations
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Cited by
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Topological Insulator Materials
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Symmetry and Topology in Non-Hermitian Physics
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Metadata
- Authors
- Slager, R.-J., Mesaros, A., Juričić, V., & Zaanen, J.
- Venue
- Nature Physics
- Published
- 2012-12-16
- Volume
- 9
- Issue
- 2
- Pages
- 98-102
- ISSN
- 1745-2473 (ISSN-L)
- 1745-2481
- OpenAlex
- W1989250610
- Cited by
- 652
- References
- 19
- FWCI
- 13.79
- Type
- journal article
- Language
- en
- Open access
- green
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