Charge order and superconductivity in kagome materials

Lattice geometry, topological electron behaviour and the competition between different possible ground states all play a role in determining the properties of correlated materials with geometric frustration such as in the kagome lattice structure. The recently discovered compounds KV3Sb5, CsV3Sb5 and RbV3Sb5, which all feature a kagome net of vanadium atoms, exhibit superconductivity at low temperature and an unusual charge order at high temperature. In my talk, I will discuss the origins of these unconventional orders, place them in the context of wider research efforts in topological physics and superconductivity, and highlight the open problems for this field.

Reference:
Nature Physics 18, 137–143 (2022)