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Topological kagome magnets and superconductors
Jia-Xin Yin1,2, Biao Lian3, M Zahid Hasan4,5,6,7
1Department of Physics, Princeton University, Princeton, NJ, USA. yinjx@sustech.edu.cn.
Nature
|December 21, 2022
Summary
Kagome lattice materials exhibit unique electronic properties like Dirac fermions and flat bands, enabling novel topological magnets and superconductors. This review explores their emergent phenomena, bridging quantum physics and condensed matter.
Area of Science:
- Condensed Matter Physics
- Quantum Materials Science
- Topological Matter
Background:
- Kagome lattices possess intrinsic Dirac fermions, flat bands, and van Hove singularities.
- These features facilitate topological properties, magnetism, and exotic many-body orders.
- Kagome materials are promising platforms for discovering novel quantum phenomena.
Purpose of the Study:
- To review recent advancements in topological kagome materials.
- To connect theoretical concepts with experimental findings in this field.
- To highlight the interplay between geometry, topology, spin, and correlation.
Main Methods:
- Review of theoretical frameworks for kagome lattice electronic structures.
- Analysis of experimental realizations of topological magnetism and superconductivity.
- Exploration of flat-band phenomena and unconventional charge-density waves.
Main Results:
- Demonstration of Chern and Weyl topological magnetism in kagome systems.
- Observation of diverse flat-band many-body correlations.
- Investigation into unconventional charge-density waves and superconductivity.
Conclusions:
- Kagome magnets and superconductors exhibit rich emergent phenomena driven by quantum interactions.
- These materials bridge topological quantum physics and correlated many-body physics.
- Advancements in kagome materials significantly expand the frontier of topological quantum matter.
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