2021年1月
Square-root topological semimetals
Physical Review B
- ,
- ,
- 巻
- 103
- 号
- 4
- 開始ページ
- 045136-1
- 終了ページ
- 045136-8
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevB.103.045136
- 出版者・発行元
- American Physical Society
We propose topological semimetals generated by the square-root operation for tight-binding models in two and three dimensions, which we call square-root topological semimetals. The square-root topological semimetals host topological band touching at finite energies, whose topological protection is inherited from the squared Hamiltonian. Such a topological character is also reflected in emergence of boundary modes with finite energies. Specifically, focusing on topological properties of squared Hamiltonian in class AIII, we reveal that a decorated honeycomb (decorated diamond) model hosts finite-energy Dirac cones (nodal lines). We also propose a realization of a square-root topological semimetal in a spring-mass model, where robustness of finite-energy Dirac points against the change of tension is elucidated.
- リンク情報
- ID情報
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- DOI : 10.1103/PhysRevB.103.045136
- ISSN : 2469-9950
- eISSN : 2469-9969