Hund's metallicity enhanced by a van Hove singularity in cubic perovskite systems
Hund's metallicity enhanced by a van Hove singularity in cubic perovskite systems
A van Hove singularity (VHS) often significantly amplifies the electronic instability of a crystalline solid, including correlation-induced phenomena such as Hund's metallicity. We perform a systematic study on the interplay between Hund's coupling and electronic structures with a VHS focusing on Hund's metallicity. We construct a simplified tight-binding model targeting …