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Article
Van Hove annihilation and nematic instability on a kagome lattice
A nematic phase breaks the point-group symmetry of the crystal lattice and is known to emerge in correlated materials. Here we report the observation of an intra-unit-cell nematic order and associated Fermi su...
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Article
Open AccessChiral excitonic order from twofold van Hove singularities in kagome metals
Recent experiments on kagome metals AV3Sb5 (A=K,Rb,Cs) identify twofold van Hove singularities (TvHS) with opposite concavity near the Fermi energy, generating two approximately hexagonal Fermi surfaces – one ele...