Real-frequency TPSC+DMFT investigation of the square-lattice Hubbard model
arXiv:2501.05346 · doi:10.1103/PhysRevB.111.115143
Abstract
We investigate the two-dimensional Hubbard model using a real-frequency implementation of the TPSC+DMFT approach. This hybrid method combines the nonlocal correlations captured by the Two-Particle Self-Consistent (TPSC) approach with the local dynamical correlations of Dynamical Mean-Field Theory (DMFT). The results demonstrate that TPSC+DMFT effectively describes pseudogap physics and nonlocal fluctuations in the moderately correlated regime, while also reproducing the Mott insulating state at larger interaction strengths. For doped Mott insulators, we find that TPSC+DMFT captures the evolution of Fermi pockets into Fermi arcs, consistent with the results from cluster DMFT and photoemission studies. These findings highlight the capability of TPSC+DMFT to bridge the gap between weak and strong coupling physics in Hubbard models, providing insights into spin and charge fluctuations, as well as their role in the pseudogap formation.
References in corpus (11)
- Spin correlations in the electron-doped high-transition-temperature superconductor Nd{2-x}Ce{x}CuO{4+/-delta}
- Evolution of electronic structure of doped Mott insulators - reconstruction of poles and zeros of Green's function
- Pseudogap opening and formation of Fermi arcs as an orbital-selective Mott transition in momentum space
- Fluctuation diagnostics of the electron self-energy: Origin of the pseudogap physics
- Two-stage metal-insulator transition in the 2D Hubbard model: momentum selectivity in the 8-site dynamical cluster approximation
- Stripes and spin-density waves in the doped two-dimensional Hubbard model: ground state phase diagram
- On the dangers of partial diagrammatic summations: Benchmarks for the two-dimensional Hubbard model in the weak-coupling regime
- Spin Density Waves in the Hubbard model - A DMFT approach
- Local and nonlocal electronic correlations at the metal-insulator transition in the Hubbard model in two dimensions
- Spin correlations in the bilayer Hubbard model with perpendicular electric field
- Hidden Kondo lattice physics in single-orbital Hubbard models