Magnetic wallpaper Dirac fermions and topological magnetic Dirac insulators
arXiv:2210.10740 · doi:10.1038/s41524-023-01018-3
Abstract
Topological crystalline insulators (TCIs) can host anomalous surface states which inherits the characteristics of crystalline symmetry that protects the bulk topology. Especially, the diversity of magnetic crystalline symmetries indicates the potential for novel magnetic TCIs with distinct surface characteristics. Here, we propose a topological magnetic Dirac insulator (TMDI), whose two-dimensional surface hosts fourfold-degenerate Dirac fermions protected by either the or magnetic wallpaper group. The bulk topology of TMDIs is protected by diagonal mirror symmetries, which give chiral dispersion of surface Dirac fermions and mirror-protected hinge modes. We propose candidate materials for TMDIs including NdTeClO and DyB based on first-principles calculations, and construct a general scheme for searching TMDIs using the space group of paramagnetic parent states. Our theoretical discovery of TMDIs will facilitate future research on magnetic TCIs and illustrate a distinct way to achieve anomalous surface states in magnetic crystals.
10+36 pages, 4+23 figures, published version
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Cited by in corpus (7)
- Spin-Resolved Topology and Partial Axion Angles in Three-Dimensional Insulators
- Effective action approach to the filling anomaly in crystalline topological matter
- Hall effect of ferro/antiferromagnetic wallpaper fermions
- Weyl Fermion with various chiralities in a f-electron ferromagnetic system: PrB4
- Magnon-mediated superconductivity on ferromagnetic wallpaper fermions
- Superconducting Gap Structures in Wallpaper Fermion Systems
- Double-twisted surface spectrum from hybridized Majorana Kramers pairs and wallpaper fermions