Explaining the pseudogap through damping and antidamping on the Fermi surface by imaginary spin scattering

Abstract

The mechanism of the pseudogap observed in hole-doped cuprates remains one of the central puzzles in condensed matter physics. We analyze this phenomenon via a Feynman-diagrammatic inspection of the Hubbard model. Our approach captures the pivotal interplay between Mott localization and Fermi surface topology beyond weak-coupling spin fluctuations, which would open a spectral gap near hot spots. We show that strong coupling and particle-hole asymmetry trigger a very different mechanism: a large imaginary part of the spin-fermion vertex promotes damping of antinodal fermions and, at the same time, protects the nodal Fermi arcs (antidamping). Our analysis naturally explains puzzling features of the pseudogap observed in experiments, such as Fermi arcs being cut off at the antiferromagnetic zone boundary and the subordinate role of hot spots.

7 pages

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• From non-metal to strange metal at the stripe-percolation transition in La${}_{2-x}$Sr${}_x$CuO${}_4$
• Commensurate and incommensurate magnetic order in the doped two-dimensional Hubbard model: dynamical mean-field theory analysis
• Non-linear responses and three-particle correlators in correlated electron systems exemplified by the Anderson impurity model
• Antiferromagnetic and spin spiral correlations in the doped two-dimensional Hubbard model: gauge symmetry, Ward identities, and dynamical mean-field theory analysis
• Perturbative solution of fermionic sign problem in lattice Quantum Monte Carlo
• Unambiguous fluctuation decomposition of the self-energy: pseudogap physics beyond spin fluctuations
• Real-frequency TPSC+DMFT investigation of the square-lattice Hubbard model
• Single-boson exchange formulation of the Schwinger-Dyson equation and its application to the functional renormalization group
• The finite-difference parquet method: Enhanced electron-paramagnon scattering opens a pseudogap
• Intertwined fluctuations and isotope effects in the Hubbard-Holstein model on the square lattice from functional renormalization
• Pairing boost from enhanced spin-fermion coupling in the pseudogap regime
• Multi-orbital two-particle self-consistent approach -- strengths and limitations
• Interplay between the charge density wave phase and a pseudogap under antiferromagnetic correlations
• Non-Fermi-liquid behaviour and Fermi-surface expansion induced by van Hove-driven ferromagnetic fluctuations: the D-TRILEX analysis
• Suppression of the charge fluctuations by nonlocal correlations close to the Mott transition
• Pseudogap and strange metal states in the square-lattice Hubbard model: A comprehensive study
• Disentangling real space fluctuations: the diagnostics of metal-insulator transitions beyond single-particle spectral functions
• Mott Criticality as the Confinement Transition of a Pseudogap-Mott Metal
• Diagrammatic bosonization, aspects of criticality, and the Hohenberg-Mermin-Wagner theorem in parquet approaches
• Frequency dependence of temporal spin stiffness and short-range magnetic order in the doped two-dimensional Hubbard model
• Probing the pseudogap and beyond: Examining single-particle properties of the hole- and electron-doped Hubbard model
• Pseudogap in electron-doped cuprates: thermal precursor to magnetism