Lattice geometry, topological electron behaviour and the competition between different possible ground states all play a role in determining the properties of materials with a kagome lattice structure. In particular, the compounds KV₃Sb₅, CsV₃Sb₅ and RbV₃Sb₅ all feature a kagome net of vanadium atoms. These materials have recently been shown to exhibit superconductivity at low temperature and an unusual charge order at high temperature, revealing a connection to the underlying topological nature of the band structure. We highlight these discoveries, place them in the context of wider research efforts in topological physics and superconductivity, and discuss the open problems for this field.

晶格几何、拓扑电子行为以及不同可能基态之间的竞争都在决定具有 Kagome 晶格结构的材料的性质方面发挥作用。特别地，化合物KV ₃ Sb ₅、CsV ₃ Sb ₅和RbV ₃ Sb ₅全部都具有钒原子的 kagome 网。这些材料最近被证明在低温下表现出超导性，在高温下表现出不寻常的电荷顺序，揭示了与能带结构的潜在拓扑性质的联系。我们强调这些发现，将它们置于拓扑物理学和超导领域更广泛的研究工作的背景下，并讨论该领域的未解决问题。