ArticleScientific reports2023
Emergent metallicity at the grain boundaries of higher-order topological insulators.
Article in Scientific reports, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Stabilization of Unconventional Body-Centered Tetragonal Phase in Copper Nanowires for Efficient Carbon Dioxide Electroreduction to Multi-Carbon Products.Advanced materials (Deerfield Beach, Fla.) · 2026Article
- Dispersive nodal fermions along grain boundaries in Floquet topological crystals.Scientific reports · 2025Article
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Authors and funding
3 authors.
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Abstract
Topological lattice defects, such as dislocations and grain boundaries (GBs), are ubiquitously present in the bulk of quantum materials and externally tunable in metamaterials. In terms of robust modes, localized near the defect cores, they are instrumental in identifying topological crystals, featuring the hallmark band inversion at a finite momentum (translationally active type). Here we show that the GB superlattices in both two-dimensional and three-dimensional translationally active higher-order topological insulators harbor a myriad of dispersive modes that are typically placed at finite energies, but always well-separated from the bulk states. However, when the Burgers vector of the constituting edge dislocations points toward the gapless corners or hinges, both second-order and third-order topological insulators accommodate self-organized emergent topological metals near the zero energy (half-filling) in the GB mini Brillouin zone. We discuss possible material platforms where our proposed scenarios can be realized through the band-structure and defect engineering.
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