Charge order and superconductivity in kagome materials
Charge order and superconductivity in kagome materials
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DOI：
10.1038/s41567-021-01404-y
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发表时间：
2021-12-02
期刊：
影响因子：
19.6
通讯作者：
Hasan, M. Zahid
中科院分区：
文献类型：
--
作者：
Neupert, Titus;Denner, M. Michael;Hasan, M. Zahid
超导性和相互作用形成的有序态——这两者都可能是非常规的——最近在kagome材料家族中被观察到。晶格几何、拓扑电子行为和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中发挥作用。特别是化合物KV3Sb5、CsV3Sb5和RbV3Sb5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和超导的更广泛研究工作的背景下，并讨论该领域的开放问题。
Superconductivity and ordered states formed by interactions-both of which could be unconventional-have recently been observed in a family of kagome materials.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.