Pomeranchuk Instability Induced by an Emergent Higher-Order van Hove Singularity on the Distorted Kagome Surface of Co${}_3$Sn${}_2$S${}_2$

Pranab Kumar Nag, Rajib Batabyal, Julian Ingham +11

Materials hosting flat bands at the vicinity of the Fermi level promote exotic symmetry broken states. Common to many of these are van Hove singularities at saddle points of the di…