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- W3208147744 abstract "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 cubic perovskite materials and test the effects of the VHS utilizing dynamical mean-field theory with an exact diagonalization solver. The quasiparticle weight and the low-frequency power exponent of the self-energy provide a quantitative estimation of metallicity over the phase diagram. We find the VHS to substantially enhance Hund's metallicity. The results here suggest a range of parameters through which a VHS can bring great synergy with Hund's coupling." @default.
- W3208147744 created "2021-11-08" @default.
- W3208147744 creator A5014827003 @default.
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- W3208147744 date "2021-10-22" @default.
- W3208147744 modified "2023-10-09" @default.
- W3208147744 title "Hund's metallicity enhanced by a van Hove singularity in cubic perovskite systems" @default.
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- W3208147744 doi "https://doi.org/10.1103/physrevb.104.165138" @default.
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