書誌事項
- 公開日
- 2017-01-23
- 権利情報
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- https://creativecommons.org/licenses/by/4.0
- https://creativecommons.org/licenses/by/4.0
- DOI
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- 10.1038/s41535-016-0005-4
- 公開者
- Springer Science and Business Media LLC
説明
<jats:title>Abstract</jats:title><jats:p>Combining first-principles calculations and effective model analysis, we predict that CaTe is a topological node-line semimetal in the absence of the spin-orbit coupling. Using a slab model, we obtain the nearly flat <jats:italic>drumhead</jats:italic> surface state near the Fermi level. When the spin-orbit coupling is included, three node lines will evolve into a pair of Dirac points along the <jats:italic>M</jats:italic>−<jats:italic>R</jats:italic> line. These Dirac points are robust and protected by the <jats:italic>C</jats:italic><jats:sub>4</jats:sub> rotation symmetry. Once this crystal symmetry is broken, the Dirac points will be eliminated, and the system becomes a strong topological insulator.</jats:p>
収録刊行物
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- npj Quantum Materials
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npj Quantum Materials 2 (1), 3-, 2017-01-23
Springer Science and Business Media LLC