Surface fRG extension shows d-wave superconductivity from the 2D Hubbard model persists across most interlayer couplings but splits into two regimes separated by a narrow region of incommensurate spin-density-wave and spin-bond order at intermediate couplings.
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Next-nearest-neighbor Coulomb repulsion favors a 2x2 loop current charge density wave on the kagome lattice at van Hove filling, with stronger interactions driving a C6-breaking nematic state and superconducting instabilities descending from the charge fluctuations.
DMFT on a single-band Hubbard model for Ni3In shows non-Fermi-liquid self-energy and local moments at moderate U, with crossover to heavy Fermi liquid upon hole doping.
DQMC simulations of the tunable t'/t Hubbard model show suppression of nearest-neighbor antiferromagnetic correlations, enhancement of next-nearest-neighbor correlations linked to a low-T specific heat peak, and U-driven shifts in crossover points.
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Surface Functional Renormalization Group for Layered Quantum Materials
Surface fRG extension shows d-wave superconductivity from the 2D Hubbard model persists across most interlayer couplings but splits into two regimes separated by a narrow region of incommensurate spin-density-wave and spin-bond order at intermediate couplings.
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Strange metallicity in the Kagome metal Ni$_3$In: a DMFT investigation
DMFT on a single-band Hubbard model for Ni3In shows non-Fermi-liquid self-energy and local moments at moderate U, with crossover to heavy Fermi liquid upon hole doping.