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- W4319453585 abstract "Motivated by the experimental identification of a higher-order van Hove singularity (VHS) in AV$_3$Sb$_5$ kagome metals, we study electronic instabilities of 2D lattice models with higher-order VHS and flavor degeneracy. In contrast to conventional VHSs, the larger power-law density of states and the weaker nesting propensity of higher-order VHSs conspire together to generate distinct competing instabilities. After discussing the occurrence of higher-order VHSs on square and kagome lattice models, we perform unbiased renormalization group calculations to study competing instabilities and find a rich phase diagram containing ferromagnetism, anti-ferromagnetism, superconductivity and Pomeranchuk orders. Remarkably, there is a generic transition from superconductivity to a $d$-wave Pomeranchuk order with increasing flavor number. Implications for the intriguing quantum states of AV$_3$Sb$_5$ kagome metals are also discussed." @default.
- W4319453585 created "2023-02-09" @default.
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- W4319453585 date "2023-02-06" @default.
- W4319453585 modified "2023-09-26" @default.
- W4319453585 title "Enhanced nematicity emerging from higher-order van Hove singularities" @default.
- W4319453585 doi "https://doi.org/10.48550/arxiv.2302.02906" @default.
- W4319453585 hasPublicationYear "2023" @default.
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