A unified classification of 3D Van Hove singularities (ordinary M-type, higher-order T-types, noncritical N-types, and S-types) is established and realized by tuning hopping in an s-orbital pyrochlore model with spin-orbit coupling.
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cond-mat.str-el 2years
2026 2verdicts
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In the 2D attractive Hubbard model, Tc is enhanced near Van Hove singularities only for weak interactions, while the global maximum Tc occurs at intermediate coupling away from the singularity.
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Directional Criticality and Higher-Order Flatness: Designing Van Hove Singularities in Three Dimensions
A unified classification of 3D Van Hove singularities (ordinary M-type, higher-order T-types, noncritical N-types, and S-types) is established and realized by tuning hopping in an s-orbital pyrochlore model with spin-orbit coupling.
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Superconductivity near two-dimensional Van Hove singularities: a determinant quantum Monte Carlo study
In the 2D attractive Hubbard model, Tc is enhanced near Van Hove singularities only for weak interactions, while the global maximum Tc occurs at intermediate coupling away from the singularity.