The DOI matches its Crossref record; 78 of the 78 references it cites were found in a registry or an index.
Ca3P2and other topological semimetals with line nodes and drumhead surface states
Open accessAbstract
Topological nodal line semimetals exhibit protected one-dimensional Fermi lines, which arise due to an intricate interplay between the symmetry and topology of the electronic wave functions. In this paper, the authors derive the $\mathbb{Z}$ invariants that guarantee the stability of the line nodes in the bulk under reflection symmetry and show that a quantized Berry phase (i.e, a ${\mathbb{Z}}_{2}$ invariant) leads to the appearance of protected surfaces states, which take the shape of a drumhead. Most importantly, a relation between the $\mathbb{Z}$ invariant, which characterizes the bulk, and the quantized Berry phase is derived. This relation is generally applicable to any topological nodal line semimetal with or without spin-orbit coupling. Moreover, it is shown that the Berry phase invariant can be simply obtained by computing the reflection parity eigenvalues. As a representative example of a topological nodal line semimetal, the authors examine Ca${}_{3}$P${}_{2}$, which has been identified as an ideal system with the line nodes at the Fermi energy. Using numerical calculations, they show that the drumhead surface state of Ca${}_{3}$P${}_{2}$ has a rather weak dispersion, which implies that correlation effects are enhanced at the surface.
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Discovery of topological Weyl fermion lines and drumhead surface states in a room temperature magnet
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Metadata
- Authors
- Chan, Y.-H., Chiu, C.-K., Chou, M. Y., & Schnyder, A. P.
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 2016-05-17
- Volume
- 93
- Issue
- 20
- ISSN
- 2469-9950 (ISSN-L)
- 2469-9969
- OpenAlex
- W2173793657
- Cited by
- 386
- References
- 78
- FWCI
- 27.94
- Type
- journal article
- Language
- en
- Open access
- green
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