Abstract
The chemical rules for predicting and understanding topological states in stacked kagome and honeycomb lattices are studied in both analytical and numerical ways. Starting with a minimal five-band tight-binding model, all the topological states are sorted into five groups, which are determined by the interlayer and intralayer hopping parameters. Combined with the model, an algorithm is designed to obtain a series of experimentally synthesized topological semimetals with kagome and honeycomb layers, i.e., IAMX family (IA = Alkali metal element, M = Rare earth metal element, X = Carbon group element), in the inorganic crystal structure database. A follow-up high-throughput calculation shows that IAMX family materials are all nodal-line semimetals and they will be Weyl semimetals after taking spin-orbit coupling into consideration. To have further insights into the topology of the IAMX family, a detailed chemical rule analysis is carried out on the high-throughput calculations, including the lattice constants of the structure, intralayer and interlayer couplings, bond strengths, electronegativity, and so on, which are consistent with the tight-binding model. This study provides a way to discover and modulate topological properties in stacked kagome and honeycomb crystals and offers candidates for studying topology-related properties like topological superconductors and axion insulators.
Original language | English |
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Article number | 2309803 |
Journal | Advanced Materials |
Volume | 36 |
Issue number | 15 |
DOIs | |
State | Published - Apr 11 2024 |
Externally published | Yes |
Funding
L.Z. and F.Y. contributed equally to this work. The authors acknowledged the support from the National Natural Science Foundation of China (Grant nos. 12047503 and 12374165), and National Key R&D Young Scientist Project 2023YFA1407400.
Funders | Funder number |
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National Natural Science Foundation of China | 12047503, 12374165 |
National Key R&D Young Scientist Project | 2023YFA1407400 |
Keywords
- condensed matter physics
- density functional theory
- high-throughput calculation
- tight-binding model
- topological semimetal